Malicious PDF — malware analysis report

Static analysis result for SHA-256 d634e5201de175da…

MALICIOUS

PDF

102.5 KB Created: 2021-07-09 18:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9ed0b32f1301c78bbd2a92345fca37fd SHA-1: 7f8b0992e97192f1e4d007a824993ed46077e716 SHA-256: d634e5201de175da91d7443b472229f92931162307d74598cd72ce7f1b04b143
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious files or redirect users to phishing sites. Although no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9767

Heuristics 6

  • 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 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://limeitec.com/upfiles/editor/files/7955112959.pdf In PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/fd945c73f3d5b69c721b8aab261302df/76003218943.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/9dbc0d1317487c4577bfb599537c4a4b/93167327301.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/3841533366.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d52354fda5---25542959259.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f360eb162---68968562766.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/u1s5lamljlj9a8pmg26vf876u7/turuzarakivuzij.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/49368607427.pdfIn PDF document text
    • http://andrewsexes.org/clients/867461/File/gudirodakosixabe.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/u13qt77ltdh0s3s2hdie6pjrht/98456816969.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d89ccd714---26728841259.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077b3b43cc58---bilolebesoje.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/061904079005.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/0079980be886df1a62dbab868d31614a/65151602726.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/d8ae6a818d916535f7c6f4fb8c652d1a/47205816578.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/25334620361.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/79e44f04d45cbbd6fe492b19a795d5a5/davurinomoxugomukula.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/gumofoxaruxafikatugiboni.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/pc2od7544pvgp6p0mfau98jpfo/79808246261.pdfIn PDF document text
    • https://bjsteelvietnam.com/upload/fck/file/14813372259.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160909755058f1---97023592590.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/bf46062bc27dc8296a3ea2e0d6aa1417/jodimogogulup.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/galilof.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/3d1p43dl9u3vskrm8iga2hgmu3/15142546095.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074082d8c35d---23754844947.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=meaning+of+deploredPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00014f15.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14F15 21560 bytes
SHA-256: b2c0c99b1bd81a757696147e95a15a0309ff27373bd2bc4a32285b9eedc3118c
font_00_sfnt_off0000e4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D2 26872 bytes
SHA-256: 1ab993d03e71fede703b77422660f763e607f7a120dbb2249d4ae1ead4d43fd6
font_01_sfnt_off000124e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E7 4944 bytes
SHA-256: 905d1adc6f5a9991c8c37032928b755660b350d646ed0c5e56a26eaee094e1a2
font_02_sfnt_off00013704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13704 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001745d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1745D 10400 bytes
SHA-256: f87b63d36016668248da110857700d62553d082cdc0a87e2080593ffe0a1565e

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