Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e65f7040bbe945d…

MALICIOUS

PDF

141.4 KB Created: 2021-08-03 08:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: ba1d4638346736c0139611faffa672e2 SHA-1: 43c387341617107a3e91ef9911bdbd2a0c36f85a SHA-256: 1e65f7040bbe945de40cce3a1b630ad5109a820de62a31fcc49021a17d9a3172
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of external URIs and the PDF_RANDOM_URL_LINK heuristic indicate an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution. No scripts were extracted, but the overall structure points to a malicious document designed to exploit user trust through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9315

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9a53d8e3f---45600295076.pdf In PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/010837aa6542ef936b619bcffe7572a7/33707099573.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/zigeke.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/fifimunoxofusev.pdfIn PDF document text
    • https://hoongnau.com/upload/files/vojaxasove.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/simenafixewubelalu.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc09800ab6---35453846100.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/72679044234.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/fepobubof.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105021236567293.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088250bc322f---vozebaxinixonuvolutam.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/a9sd5lc6v88bmmmktdd256mcm0/sizezimebilaza.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/xobugojekano.pdfIn PDF document text
    • http://texmet.pl/userimages/file/65673793280.pdfIn PDF document text
    • http://a-pluset.com/userfiles/serifujorapinonuwif.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05567c4334---68867201450.pdfIn PDF document text
    • http://ntrc.biz/clients/f/f0/f0759d16aca5b3dfc9163ee994587b7f/File/xunodonubekiseximuf.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ee9078dd6---49314301562.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7406e5a55---71540807378.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/kobd8f6srr4vnq0g40ikjghjlr/90626863206.pdfIn PDF document text
    • http://temple.mo/userfiles/file/87835630244.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/wunotaguja.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/zokufedo.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/ig765kapujeqanmpqc9foe5j3t/xemunil.pdfIn PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/92223442611.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/0vbsv3n6199prjrnjnp6es22fp/gidabawirisofev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=blackshot+gem+hack+2019PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001b5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5E0 10508 bytes
SHA-256: a94537f1d0c5d4db3132bf5bec798c15e371d2553b0ba7adcd193e96bf173ed2
font_02_sfnt_off0001d79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D79C 19872 bytes
SHA-256: 46f71bf26f1c27498bdaaff810c310202a9b679ad7e02de7fd545ad1ffae1278
font_03_sfnt_off00020be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20BE1 10988 bytes
SHA-256: 594b35a2a1bda75eb651504cddf27424c1dc7920b71b42a529e86bd5e1fb8984

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