Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a5be69ebd53f30…

MALICIOUS

PDF

97.4 KB Created: 2021-05-18 00:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a5afeb10a988b15f4d0c5873de078f4e SHA-1: 6977c3113ff9a0c7e20a3fd96cbce35365277f04 SHA-256: 69a5be69ebd53f3014b9dc0353055fb6dbcdff161c24bd42c2216c8ca01fdfe7
254 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a credential phishing campaign, specifically impersonating Instagram. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to obscure the final phishing destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into submitting login details via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 8

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://zaroralovez.weebly.com/uploads/1/3/0/8/130814195/zokikunakumefofe.pdf.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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+much+is+the+salary+of+seaman+in+nigeria+navy PDF link annotation
    • https://zaroralovez.weebly.com/uploads/1/3/0/8/130814195/zokikunakumefofe.pdfIn PDF document text
    • https://wolofineso.weebly.com/uploads/1/3/4/5/134598063/9491620b.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/pukijutem_faxibufegunuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_5fd644cd1c3b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_60611dca11031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492546/normal_605c5d9433c90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416501/normal_5feb32f354211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503692/normal_604906859d269.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/294d3c12d03c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491926/normal_5ffc9e6888d01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407102/normal_60294716c89a3.pdfIn PDF document text
    • https://feposogasutam.weebly.com/uploads/1/3/1/3/131384530/757b936f10.pdfIn PDF document text
    • https://donurufeto.weebly.com/uploads/1/3/4/8/134898164/jikajutotigizow_tunexorivuxi.pdfIn PDF document text
    • https://ganizosu.weebly.com/uploads/1/3/4/4/134434359/jadojakanutore-kebepefuwed-fetodij-ratudedigom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5fda8dd0aa990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_6063d649e24e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dozonixenot.epizy.com/what_are_the_different_drywall_finishes.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/agric_loan_form.pdfIn PDF document text
    • http://seviboki.rf.gd/how_to_update_my_nextbook_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/94791452685.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/rudiparexinujekesefeg.pdfIn PDF document text
    • http://fipuxogililego.epizy.com/naluloxexufelugobenubadit.pdfIn PDF document text
    • http://xupevovegizem.rf.gd/scientific_advertising.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/2019_toyota_camry_xse_interior_features.pdfIn PDF document text
    • http://xafofeb.epizy.com/disney_brother_bear.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_off00012daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAA 5392 bytes
SHA-256: 4c311b23939060355fc07574d5f4021b8d2243dcefae4b1a7e48da5468f5ed2f
font_01_sfnt_off00013ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF7 11584 bytes
SHA-256: ee3f8bf3e7b84a51f898dc58c892453d53d5ae1ee025bfde13af62b6b10c91bb
font_02_sfnt_off00016767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16767 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361