Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d67f26aeba7591…

MALICIOUS

PDF

73.6 KB Created: 2021-07-19 21:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e1e70210c21de9942ed6aed0105b319b SHA-1: 33d0d50db5ae4b6b2f400e52aad5ce8fc3e7d5b2 SHA-256: f0d67f26aeba7591a856af245e4ceade13dfb3ee61fdeee53c30e5a5349a3898
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution lure. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16082ba2f7a6b7---32350114405.pdf In PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6db33eacbf---60630599340.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/tirinirixomedirazeteti.pdfIn PDF document text
    • http://renovator.cz/files/file/48563087095.pdfIn PDF document text
    • https://dpmceramiche.it/file/60249376713.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/23661400771.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833c99487b3---tixorejumez.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/16f5a43f2e268778ea8b74f5cdee323d/futamifokuwilelotiriwa.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/jakakole.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/mozumularuwemopeninijotin.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/dibakelefuvimosisi.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/remorerozupuzut.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/kuxoxubeb.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/0725b312dcc9bfa1a2f7bd74c13fb57f/10680487316.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/bejkfcojmqhtag7vf6jcjc85oa/wafesulopofo.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/lakuzofuwiforerema.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/64435084180.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9487444f1---nanapikerulupobefepujof.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/xazikomexumuxebimig.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/defobunojunepig.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/10691527351.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/tetuvelejebinuvez.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742fea48993---56895243227.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/jusitabujazi.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/20891703936.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+waterfront+vauxhallPDF 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_off0000bf10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF10 16324 bytes
SHA-256: 215ffd1963816374e97fcdafb599a2e0c250c6270511936fe9dfb53f0948cdbb
font_01_sfnt_off0000e973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE973 10368 bytes
SHA-256: bab15e3bb6ae046b150778b4d6080f6c38a2910bc757058b3c92af2396d41332
font_02_sfnt_off000100f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1