Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fa7b1274bbfe354…

MALICIOUS

PDF

106.8 KB Created: 2021-06-19 21:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5deb65065bb58245b4d89e5221d1b06e SHA-1: f6c455c38b516d0d550b3de49b78278e73dc3cc8 SHA-256: 3fa7b1274bbfe354074047bd2a74023c9a2b7484dd0bc4c49d087adf42a96dab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9749

Heuristics 5

  • 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
  • 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://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090f668bc03a---36466055264.pdf In PDF document text
    • http://nkcophs50threunion.com/clients/0/01/014062e559e26c1cf0711bcec4e573ae/File/63907497940.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/5b34e125adc5d48316af6048b7f106f2/kutodewidaxodid.pdfIn PDF document text
    • http://sport-way.ru/img/file/91974914450.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b95988e93c5---17845616553.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b859a0ece60---96697533786.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/9a78af8a9b0ed5eb09ebc064d823bf89/luzelu.pdfIn PDF document text
    • http://ahchala.com/img/file/takubulox.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c428c6ba749---modolakewufabefezabudelo.pdfIn PDF document text
    • http://sfera-vlad.ru/img/file/91718895918.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/c3cf39785ef9e80678b1974466454d93/55296937757.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/3727492751.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/25010726993.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba4df7f740---jofobulugite.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/13179241082.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/fc34408084fb6a5bf658dae0e720e577/90288910194.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=literary+criticism+theories+pdfPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000179b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179B1 5408 bytes
SHA-256: 5b12eb632f48ac0ce7c5f18183349416c029a6516f15b64f3154af7ac733701f
font_01_sfnt_off00018bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BF3 11624 bytes
SHA-256: 8fd7277c829120052d3b65f00856d22f01c33f4a9d79219b4097853b2b3637ff

Open this report in the interactive analyzer, or submit your own file for analysis.