Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd70030dbdf0c1d8…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 20:38:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 625f4134e2f433f784914ca82c01e4bf SHA-1: cfd16c41258c24fcd05ac4e856889122a1675925 SHA-256: cd70030dbdf0c1d8c014b8e17355f2cdb31570e98e01353e61d5d23672594701
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories and disposable hosting, indicating a likely attempt to distribute malicious content or conduct phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://inwebjor.ru/uplcv?utm_term=body+and+soul+taylor+swift PDF link annotation
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//46568272453.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/33659430685.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/laxorek.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/95845752463.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ceb3c076bccf42b4492040a68752abd/bisoketisagobisufabef.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/tigobasu.pdfIn PDF document text
    • http://orderkai.com/uploads/files/1122590632.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/m4qu7h01ak15f5dj4ujc7pblo2/nozelebepugakalinigumir.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25e7ecf434---sezuvatato.pdfIn PDF document text
    • http://burke-gallonfamilyreunion.com/clients/28163/File/nosimuvopitemidudo.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/pha584chr782vqfiv7qov7o5hq/pusevafebemosita.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9114794731.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160823c1dc7299---zegubozozijurapogura.pdfIn PDF document text
    • http://tivati.com/uploads/userfiles/file/44675317198.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36847755577.pdfIn PDF document text
    • https://rozgarnetwork.com/ckfinder/userfiles/files/74818488270.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/wasike.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/1a77fd8ab87288212ff51d3cf7ee1871/86250337733.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210804233103.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/fuvolaxij.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c926b47fa465ff6463bef525bd51448b/7879521258.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/e380phhb650glccug1i0mv25k6/palubojemi.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/vt1k34csgibevdivbc3fgpgam7/72009868177.pdfIn PDF document text
    • http://www.julietlandau.com/fckeditor/userfiles/file/poxetativovilexodibetuluk.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73B 10568 bytes
SHA-256: ad408e084007d0a067919c70d32d2a7f805f3f06380c4f534f0521342fe6fb5a
font_01_sfnt_off0000ff8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8E 17968 bytes
SHA-256: 3ea916f1fab6a5a9be518c2037a05fb97cf33ff72324a7c5fb63ec63d20be64a
font_02_sfnt_off00012e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1