Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0cd8262c9f5eba…

MALICIOUS

PDF

65.7 KB Created: 2020-11-14 00:19:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fb573aee82af946d82a06443c929585 SHA-1: 6573546e545d78be7be4b52a79ac9df3c280ef0d SHA-256: 0d0cd8262c9f5eba74473c996f62410144b6dc84d37648ad9b1960414652fdd3
176 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 multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The presence of a PDF link farm and embedded URLs suggests an attempt to redirect users to malicious sites, potentially for phishing or SEO manipulation. The 'SE_CALLBACK_LURE' heuristic further supports a phishing or scam-related intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/123?utm_term=wahl+9855+instructions
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/wotusotosig.pdf
    • https://bapadiwifujeki.weebly.com/uploads/1/3/4/0/134041393/rojabo.pdf
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/1224738.pdf
    • https://veborikaja.weebly.com/uploads/1/3/4/3/134317734/tutufanabibi.pdf
    • https://velabusodogir.weebly.com/uploads/1/3/1/8/131858366/zasixirilanizubula.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fedufiporara/activity_based_learning.pdf
    • https://uploads.strikinglycdn.com/files/cb5fce79-0302-43c0-8386-a940fefb1eb5/32676813304.pdf
    • https://uploads.strikinglycdn.com/files/c08c9e39-dbc9-4fd1-8f48-8c97fced86de/fuvoguna.pdf
    • https://s3.amazonaws.com/tutapaxi/printable_guitar_headstock_templates.pdf
    • https://s3.amazonaws.com/purawuma/broadlink_rm_mini3_manual.pdf
    • https://s3.amazonaws.com/leteraxewe/paladin_oaths_5e_phb.pdf
    • https://uploads.strikinglycdn.com/files/01d77071-e7f8-4a98-a4c9-386119c31f4a/14862114442.pdf
    • https://s3.amazonaws.com/fadobirak/process_step_offer_phase_ext_to_pre_hire_list.pdf
    • https://s3.amazonaws.com/zaxawetawupo/tumibusat.pdf
    • https://s3.amazonaws.com/tokatefozude/dubavares.pdf
    • https://s3.amazonaws.com/lopadivupudexa/facade_design.pdf
    • https://s3.amazonaws.com/jenisozazewubo/stoughton_youth_baseball_stoughton_ma.pdf
    • https://uploads.strikinglycdn.com/files/c5ebf047-b92e-4b4e-b223-8f8e0936e215/62625870913.pdf
    • 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_off0000c679.bin
76b870b8618811a5faf020beadc95d21dae8009cee435b0f32549d4cb6a22171		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC679 5372 bytes
font_01_sfnt_off0000d8cd.bin
a08139168468fc520acd9d6bb802dd985def6c5e225bda97b5b261ae9f5ec2f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CD 9780 bytes

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