Malicious PDF — malware analysis report

Static analysis result for SHA-256 be06769b95fbb9d2…

MALICIOUS

PDF

78.0 KB Created: 2021-06-13 12:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c1becc4ff8a79f51be0717556e4eda9d SHA-1: 0549aadf84ee609753349d0d3d5bee4104b0a786 SHA-256: be06769b95fbb9d2ce74c36000aea2426dbfa8ed1d8645e6bc3940a73a596f11
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing or malicious link farm. It contains numerous external links, many hosted on disposable domains, designed to redirect users to other potentially harmful content. The primary lure appears to be a fake download for a game, indicated by the URL containing 'fs+16+unlimited+money+free+download'. No scripts were extracted, but the extensive link farm suggests an attempt to distribute further malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://wastran.ru/pbw?utm_term=fs+16+unlimited+money+free+download PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4456391/normal_60b55476876cc.pdfIn PDF document text
    • https://mivojunap.weebly.com/uploads/1/3/4/7/134720575/revujepoma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463794/normal_5fed389d1055e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459654/normal_606a1f4b4f635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443354/normal_600a1f861a280.pdfIn PDF document text
    • https://lalurarejodu.weebly.com/uploads/1/3/5/2/135297054/6556067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_60370cda78616.pdfIn PDF document text
    • https://xojowikenokux.weebly.com/uploads/1/3/4/7/134706662/rawajag_zovaxuduroliv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422373/normal_5fde8ce4cdedf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425784/normal_601753558ff0c.pdfIn PDF document text
    • https://sozejaras.weebly.com/uploads/1/3/2/6/132695734/3455366d.pdfIn PDF document text
    • https://sibikobibe.weebly.com/uploads/1/3/4/0/134040949/40e4649.pdfIn PDF document text
    • https://razitesewiwi.weebly.com/uploads/1/3/2/8/132815022/1227a2.pdfIn PDF document text
    • https://getazaxebu.weebly.com/uploads/1/3/4/8/134866961/a7bac5f.pdfIn PDF document text
    • https://govexofube.weebly.com/uploads/1/3/1/8/131872198/vuwixef.pdfIn PDF document text
    • https://dirututusobed.weebly.com/uploads/1/3/5/3/135347210/6f21f881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467586/normal_605af57e5f313.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385850/normal_5feef46ca69cc.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/ded28d25-3de2-40aa-bea6-7f7b2cd9946c/wildgame_innovations_deer_feeder_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a263ebf-2aa3-4c9c-b540-88fe44738515/how_to_use_central_pneumatic_18_gauge_brad_nailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c2ac38-727e-4e91-9e6e-92e6f04e8b2f/76322299282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229d535b-a59e-48ab-a4d8-2850a822ce79/why_is_sicl4_simple_molecular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af289005-2cde-4cfd-b73a-3c033440625f/divina_commedia_paradiso_canto_1_riassunto_e_analisi.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_off0000e973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE973 5408 bytes
SHA-256: bc095c804696846497c0cfbbb5f8fc88d50b9019bc3e9abd01e57b0e5987bc98
font_01_sfnt_off0000fbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDD 14948 bytes
SHA-256: 8120e0771f660e5434a07922fd04406be31cfb16903244eabe66673ff997b593