Malicious PDF — malware analysis report

Static analysis result for SHA-256 667e268c9dd23bb0…

MALICIOUS

PDF

69.5 KB Created: 2021-09-30 21:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 3bafc4abc592dbbc5a49b4882b79c29d SHA-1: a269fb5d27891f69ad16a767ec00106bb3c322df SHA-256: 667e268c9dd23bb0c38bed4c1c59926acb5029e17c321da7b2fd3a1924d62c80
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs pointing to compromised websites and disposable hosting, indicative of a phishing or scam campaign. The 'SE_CALLBACK_LURE' heuristic specifically identifies the document's intent to trick users into calling a phone number, a common tactic in callback phishing. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely involving social engineering to extract sensitive information or financial gain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://laborke.ru/uplcv?utm_term=win+98+simulator PDF link annotation
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/0cac98e312cda133b6103469a62f258a/levufituzul.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/ponezigolamitizuw.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/21288468398.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/fubokitafijunobut.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/94853984313.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/65ec591c9144d14761afb19c63dbdafa/69497949036.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/10319020785.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/pibubusal.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/wutefobilegogoxolonunokil.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/68943029962.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/mateganazas.pdfIn PDF document text
    • http://speckrepej.com/upload/file/loxarawog.pdfIn PDF document text
    • http://stefani.cz/fck/file/tobogonirajisotezal.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/bawofasukolu.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/fewibuxevozebuva.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/7307495755.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210913023033.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/43195493227.pdfIn PDF document text
    • http://df-2.de/images/daten/file/xuwon.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/161350448ba333---xozupevo.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/powagaxerutifenunuzaba.pdfIn PDF document text
    • http://leylatoprak.com/userfiles/file/82678800919.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/25044201275.pdfIn 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://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_off0000af45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC757 16268 bytes
SHA-256: 9e8df8a7c0bb21399717d7b0e35c392fd43ccc204c82314dcb01cca9ac68ce2b
font_02_sfnt_off0000f0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B0 10604 bytes
SHA-256: 5848a066c7b1fbca775b9b0de2887c4f05f93244e83743c3e4f1c0f7f9bb5abd

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