Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc4e9aaed6db14f…

MALICIOUS

PDF

90.2 KB Created: 2021-04-15 02:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9b49e32a0f4939b297b6a0d3c10c0884 SHA-1: c30e823093b225078454055d47743db10fd02f8c SHA-256: bbc4e9aaed6db14f6851489bd89954e65045e5a131d522f878d539e8676fdf42
226 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is part of an advance-fee scam, specifically a lottery or parcel delivery lure. It also contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 https://baarspo.ru/strik?utm_term=how+to+install+tp-link+tl-wn725n+without+cd PDF link annotation
    • https://jalamipitifem.weebly.com/uploads/1/3/0/7/130738892/dosamanoweri.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/hg7jgKX/arqueologia_prohibida_libro.pdfIn PDF document text
    • https://jijixedo.weebly.com/uploads/1/3/1/3/131398351/fuzoxiwi-veridewuti-taxulabatina-sijilajifufeg.pdfIn PDF document text
    • http://wirajamosilun.22web.org/cidco_lottery_result_taloja.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxapivasif/iiicTha/35294793639.pdfIn PDF document text
    • https://rosowimibezot.weebly.com/uploads/1/3/5/3/135392622/2257945.pdfIn PDF document text
    • https://sowikidorazeku.weebly.com/uploads/1/3/5/3/135306740/540869d7f612.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/hiJUhis/fishdom_online_playrix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_d0d420a7557d4e63a115e3d623dfa786.pdf?index=trueIn PDF document text
    • http://rabelame.atwebpages.com/gojoxararukanogejuneli.pdfIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_cae41652030d4088a027f078c0a97395.pdf?index=trueIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_f20b29e41a2443d3a09f8c2fa4d6e4ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pisik/15972880340.pdfIn PDF document text
    • http://xasejumav.onlinewebshop.net/3407222047.pdfIn PDF document text
    • http://rawotagetanona.rf.gd/temesulepefudedafelepif.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/17475642461.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E6 5548 bytes
SHA-256: 3101ed0e54ac4b433b16f6aff7af63a473c1e69165124c1f816db0578165c604
font_01_sfnt_off000128e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E5 2268 bytes
SHA-256: 87560c96094722e0b06e960fc6e6e0982e5dd9a45b3b8c8ce6a725bc3f373f32
font_02_sfnt_off000132f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F7 11680 bytes
SHA-256: 6543836fae29f8df50afa6cd06b7fe70c993b77c29d1c4c53044753338fe4d62

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