Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d762779762c0a36…

MALICIOUS

PDF

92.4 KB Created: 2021-06-13 05:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c386f4cb50a5741cdeaf53aa3f7c49bf SHA-1: 5b1591374d4f408709330764afbcf758e4945fa7 SHA-256: 8d762779762c0a36ea072c6b31f5762a40971f7b8553280ee36cc464438bf8d3
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. It contains numerous links to external sites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting an attempt to redirect users to credential harvesting pages or download further malware. The presence of MFA lures indicates a focus on stealing session tokens or bypassing multi-factor authentication.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://pistant.ru/uplcv?utm_term=bansal+classes+study+material+free+download+pdf PDF link annotation
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/2fd64f80d89a89533221fff2aa10de33/bijowitanemazudogodezaru.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/08117dd957a5f8b55ba3679ed3e16ce2/57073296562.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210524051102.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/47d890585c7d7d1a65c40b4582315c09/nosuwolevuno.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf67725f4d---kekezabup.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/97572737484.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b80b7479---norelekada.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608284b691744---solotudoropemezirixebibam.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/40324494942.pdfIn PDF document text
    • http://artside.org/data/temp/file/60344953938.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/e9e5508e1ae44c301b13d702d04785f8/pidogujobolukofazobesuli.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607295d65c0d3---narowazukurid.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/jiwojusadedetolejan.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b31675aa3f---8188350667.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae92452fcf---96416572624.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/6vibd6nuj11cpv8v5nntpkqiju/mirovimuzi.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/6d3df97504b1335cf4e1f436600bc15f/niterameduvoseruro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0001106a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106A 5544 bytes
SHA-256: 02cb98db79cc13233ba4d3a26d4ea7730cf7f2684acf77de2b197ce9ec97adce
font_01_sfnt_off00012344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12344 11908 bytes
SHA-256: 01edf652ec434b7da63b62e6280de8a00e44c54701d5ccf7dd07748665187d63
font_02_sfnt_off00014c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C0E 17016 bytes
SHA-256: e751c11c9f1ffe4e08b76d7f1fd83fcb49bfc35790bbb076dcb3f1a12ea086e1

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