Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea4e4cadcb5179f…

MALICIOUS

PDF

81.8 KB Created: 2021-04-05 20:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f0c00f6147f241b8a14f1afe2d69f7c9 SHA-1: 423c0560a77858ae3b608da8a156f147a835345e SHA-256: bea4e4cadcb5179fcd552275cec5471c36275c963e5b0bb6c2e05022793ecc94
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URIs, with a primary URL pointing to a suspicious domain. The document body, though heavily obfuscated, suggests it may be a lure for phishing or malware distribution by presenting seemingly legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://mezovuduw.ru/strik?utm_term=2010+chevrolet+malibu+recalls PDF link annotation
    • http://xuxikurov.mygamesonline.org/medaregetixakewujom.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/lhjDADN/50968573130.pdfIn PDF document text
    • https://vimasideb.weebly.com/uploads/1/3/3/9/133997972/4027665.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/bn9Dggf/fontspace_bold_fonts.pdfIn PDF document text
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/tonevezipi.pdfIn PDF document text
    • https://pitazifuriza.weebly.com/uploads/1/3/0/9/130969431/17186f6a17.pdfIn PDF document text
    • https://sevivuninuk.weebly.com/uploads/1/3/4/4/134459749/novebi-rugokus-pufozat.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/nejusamugu.pdfIn PDF document text
    • http://wufamega.scienceontheweb.net/78772189032.pdfIn PDF document text
    • https://cdn.sqhk.co/nebinefis/Ngj7mjj/sniper_elite_4_gameplay_time.pdfIn PDF document text
    • http://mumopajikex.mygamesonline.org/88650963653.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/0hfX3sc/tewiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/hmibW40/66475002630.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/hggemgj/o_que_e_um_touchdown.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d5b2488-da74-4c31-bb2a-8d6b19843452/to_what_extent_did_the_alliance_system_contribute_to_the_outbreak_of_world_war_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f372f82-0b6e-49f5-a587-4c4636b34a22/63498712651.pdfIn PDF document text
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_54f7dd3ed5fb4431a2f6f51acf0704ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/970bc021-85b2-4b7a-97a3-b25500dd914f/70462268280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b16844d-4bf5-4683-afea-44fff19fb221/what_is_safety_rated_on_disney_plus.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_a5cae7725201482397430e559c5d143d.pdf?index=trueIn PDF document text
    • https://fb5b3b17-6e6a-47c5-ae49-26eddba71e57.filesusr.com/ugd/aff7be_46f7c6a78c194831bccd4c429ef138b5.pdf?index=trueIn PDF document text
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_03d46c90fcfd4e5288e0123e72f08338.pdf?index=trueIn PDF document text
    • http://wutejaxevewef.myartsonline.com/beats_by_dre_studio_3_review.pdfIn PDF document text
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_8f2bbb2a1d594f749c64dad69419a722.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10187 5468 bytes
SHA-256: b2e0d25c0c263174b0aab3aaa1131e63b1b13b8d1c58bcc4e9d0be29ca175e39
font_01_sfnt_off000113fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FB 11108 bytes
SHA-256: b6b7d33c2f98756d4f51f58666fce081b1fa7ecc984f1e36475f7354fcebdccd