Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6eb1590616bbe20…

MALICIOUS

PDF

76.3 KB Created: 2021-05-27 06:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 117000b8cae67dbe825b9ed74c30032e SHA-1: 1bc35141f4eb1dc50ee4709728ac57b2c95c1d07 SHA-256: e6eb1590616bbe20df6d3990da0536cc73a4aba4b1e9421d4dbeb0ef3503cf57
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to direct users to malicious content. The 'SE_MFA_LURE' heuristic indicates the document is likely part of a credential phishing campaign, attempting to harvest MFA codes or session tokens. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or redirection to malware.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://zajinet.ru/strik?utm_term=how+do+i+unlock+my+honda+radio+code PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454967/normal_600a15ce5a5c0.pdfIn PDF document text
    • https://bulasenojagaroj.weebly.com/uploads/1/3/4/3/134357248/levebemavem_bopuzu_nazuzopuditewax_vorom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418587/normal_5fd0dd7ef299d.pdfIn PDF document text
    • https://jidamusalaf.weebly.com/uploads/1/3/4/3/134378250/getozuletabosa.pdfIn PDF document text
    • https://zidodorisud.weebly.com/uploads/1/3/4/3/134305305/74a3837f.pdfIn PDF document text
    • https://nozirurabi.weebly.com/uploads/1/3/0/7/130738896/kidagojo_namumibi_lodabo_xuzixawav.pdfIn PDF document text
    • https://sowuritujozefa.weebly.com/uploads/1/3/4/6/134621612/c996959f5e934d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5fe77bde5b7ca.pdfIn PDF document text
    • https://nizitorewazoxi.weebly.com/uploads/1/3/4/7/134704220/bavudorusavarada.pdfIn PDF document text
    • https://lujisitezolip.weebly.com/uploads/1/3/4/1/134109273/vefagot_dikiragizizi_petizum_werawa.pdfIn PDF document text
    • https://wekigenajelu.weebly.com/uploads/1/3/3/9/133999196/rokunesibi.pdfIn PDF document text
    • https://bazuditok.weebly.com/uploads/1/3/4/5/134590154/wedabokibokuw.pdfIn PDF document text
    • https://peniwifagupe.weebly.com/uploads/1/3/0/7/130738894/9df03625d9bc.pdfIn PDF document text
    • https://zutijuxugovoxi.weebly.com/uploads/1/3/4/6/134684331/5381422.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/7f1cd0cb-df86-43f7-96b5-4e1f40a62ef8/16731470716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062f5d33-af96-4b36-8c4f-5753a36ead89/lg_top_load_washing_machine_tub_clean_function.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7697788f-0c82-470e-970a-0e2cb37be3d1/somoratutixejez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb4f97c-9eff-4e45-b1ab-f063aecb7bf0/22909515626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc14e569-bfd1-4d0f-a12c-cd74e41a25fd/889127016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54344255-3a96-4485-a4ed-81c21c6c9630/revolutionary_suicide_huey_newton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec20b13-06ba-4147-be12-5138de7dcdac/78959408159.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED53 5220 bytes
SHA-256: b7ea3a3982fbe0a01018ed31eb6333ded808ef273e4983edf925ab7c0550fe0f
font_01_sfnt_off0000fefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFC 11028 bytes
SHA-256: dc4c79bfa2f39ad28065dfa055af9f80ba80bb69f239de37aee0a5836195815f

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