Malicious PDF — malware analysis report

Static analysis result for SHA-256 e253cb49c1594377…

MALICIOUS

PDF

84.6 KB Created: 2021-09-05 22:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 02f8ecb826f20e7be2c1604fa504f26a SHA-1: 7a8668df651bec41c1a08414fbc669dec0d9ab6d SHA-256: e253cb49c15943778f2c69925ec7ec66084a6ac118952f1244249b919d2e7580
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses urgent language to prompt user interaction. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160fe8dd8c8a0f---sanusinidaz.pdf In PDF document text
    • http://habitat3.eu/userfiles/files/20494563880.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/pju8br4f9s596rkgl5ru614vvt/sigilajomivevejufasusaf.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/afecc96471a438a3c18060bb13ba8cf7/nofugifore.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4b2b773f7---87653023093.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42c93eda08---83727836390.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/zunezabif.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c0d1f1d4a---81687132310.pdfIn PDF document text
    • http://vinaaquachem.com/uploads/files/kobamumabibasokuwen.pdfIn PDF document text
    • http://skincarebylaura.com/clients/862251/File/wototemalas.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/35181606030.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/tekapigedolijotina.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/32003272244.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/599105820ccf658cb7c11a4789aaa6e5/midadaromodaridodisum.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/57308926953.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/dde1s2touqucnq6hocc17bsm4t/zuxijigojureba.pdfIn PDF document text
    • http://thietbianninh188.com/uploads/files/xitogufenupixerexus.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/5raknht909e2eg2hkmln02pt34/9342643546.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/87508478544.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/g1cq87igop9s0o0fqc3imrr673/dezujajexok.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/5392165cb197255cd61f61f6b7bd9ab6/60825248344.pdfIn PDF document text
    • http://dgelc.com/userfiles/file/20210830131553.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=al+anon+step+10+worksheetPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E1 19172 bytes
SHA-256: 0dbc910e7dae4d53f6fe59c635cb4cf6b55b765771e31ab0b01ad2b92e11dc17
font_01_sfnt_off000114bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BD 10588 bytes
SHA-256: c1caea9e5d83f9240932937d3a3dce6f33b483283698e32adbd1dfbdf9b26376
font_02_sfnt_off00012d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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