Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab6060c234c9452…

MALICIOUS

PDF

119.3 KB Created: 2021-07-19 06:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 38133a7b6264e0bb0e3ce7b1e9aa2e5d SHA-1: b80b735aecc23f26e5b28a8a0de32001efed693a SHA-256: 9ab6060c234c94525672aecea9de640e7ae319ae73eb63e1efd06797073d6f0c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as a phishing trojan and flagged by an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to leverage compromised infrastructure for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7942

Heuristics 5

  • 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 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 https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da3b44798d---54220718322.pdf In PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094385a0b475---lanunepetijobaj.pdfIn PDF document text
    • http://samilove-payitforward.com/clients/f/f9/f9b0b202ed5d2cb263a89f8a9bd08a94/File/83896897692.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/eb7ab5a67015c67be0343ef7a5234f26/fiserilibawopeg.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/18898058339.pdfIn PDF document text
    • https://ebooksweb.net/files/file/gixidagef.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/xewexe.pdfIn PDF document text
    • http://wefocusdesign.com/upload/files/jekemunepirali.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/qqognf28ub1bcdhvvgj1hnavjb/fifokexok.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f5758cbb2---mutaf.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/46190047456.pdfIn PDF document text
    • http://thehigh86.com/clients/13680/File/82017859606.pdfIn PDF document text
    • http://ozona.pt/wysiwygfiles/file/mumajepukobaginafan.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/magovojanejexapane.pdfIn PDF document text
    • https://mimpishiosatu.com/contents//files/56176741505.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/fanubexokap.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/49871615093.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1afa65915---sazituvoniz.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ade5f2de16---ledixegabixotakoguga.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5ed9ab7d9---86105870414.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=and+your+name+is+jonah+moviePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B031 18472 bytes
SHA-256: e43fc79550f250f17932277ba3c3a21150a031e19ed6e7b9ed26e19b9511a820

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