Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae069732ff61e79…

MALICIOUS

PDF

76.6 KB Created: 2021-06-05 17:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5d7c5a10690501ec924b7c4ce8f3c9f SHA-1: 905e4bb84381b7d02768d09b8982f4a102e96667 SHA-256: 7ae069732ff61e7923d1a7101ba2fb8de8c124a828250ec53f7d911ebf5b9c4e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The sample is a PDF file flagged as malicious by ML classifiers and ClamAV. The 'SE_CALLBACK_LURE' heuristic indicates it's designed to trick users into calling a phone number, consistent with tech support scams or phishing. The embedded URL points to a domain associated with compromised WordPress uploads, suggesting a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=fedex+customer+service+email
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/85a94d16039b11200d4701f787759b6f/xenupovagesotusave.pdf
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/96237135074.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609913bb0af64---kidiluwudutugizatuzexo.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b45841e8e2d---55169559870.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b5f5aba1b---niridalalokesapidonotujob.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/8c5a7ioir4hklkj5ds1bi1pbe8/21405754405.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16094bc2e1cec0---duzozutileguvowemuxoxasa.pdf
    • https://iqmuseum.mn/uploads/files/83827490260.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f332343df9---fabedatiruwomatul.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160786d30ec25c---bebijijel.pdf
    • http://abacusnancy.com/userfiles/file/jikesarigimudurazuxuru.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16077cf9e30332---mikesi.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e75e5f049f---96691342779.pdf
    • http://agendatourvietnam.com/hinhanh/file/xiwexedelebitukotozurob.pdf
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/navisirijuxobawofalafimud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efec.bin
9edbf7d8ac98dc71cd49942297e0710d9ab4a2f0eeb01f76555d5deebdbb284b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 5168 bytes
font_01_sfnt_off00010173.bin
e50662a79f11ade2209ce4c473bcbc1d2713cb0d152d7356bc4624fe0b59eb77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10173 10744 bytes

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