Malicious PDF — malware analysis report

Static analysis result for SHA-256 547f711b756aaf0b…

MALICIOUS

PDF

74.7 KB Created: 2021-03-12 20:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b40d96e11e1dfb02a9d183abd59e2a25 SHA-1: a10502ae43926122a273842dfc936412c22789ed SHA-256: 547f711b756aaf0b4e7fd57c74056493990615b6d704375fc9dd47c02b4ed549
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and a document body that attempts to trick the user into clicking a link related to 'the game awards voting process'. The primary malicious URL identified is https://jottigo.ru/strik. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jottigo.ru/strik?utm_term=the+game+awards+voting+process PDF link annotation
    • http://kerutugizuxig.mygamesonline.org/how_to_express_love_to_your_husband.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473618/normal_6011217930d50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496391/normal_5fe42f773e94d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447437/normal_5fd0d9e7a28a4.pdfIn PDF document text
    • http://zizubur.22web.org/partial_budget_analysis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460966/normal_602462c82395d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450047/normal_601a1c31bbe5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368500/normal_5fcbaa1d708b1.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/61180110886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464869/normal_5fd33c7fcdb6f.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/xigonasixinatawuwoduda.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/84578399409.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabulegewuwal.myartsonline.com/83368881058.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_427df506cf554461ad1b05d145220dc2.pdf?index=trueIn PDF document text
    • http://nojikigor.myartsonline.com/xorukodijak.pdfIn PDF document text
    • http://vopapokolozanum.rf.gd/canon_rc-6_remote_control_manual.pdfIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_55b23689709b42d09ed7be1d0d7b72f1.pdf?index=trueIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_05a808eb7a3a4834b1f1ddc95a3a951c.pdf?index=trueIn PDF document text
    • http://sonowodiguvab.epizy.com/esv_study_bible.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_off0000e81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81D 5556 bytes
SHA-256: e332439746216521207faf78d48fd5d555fc6fb60be1819bd78116e0ac81e30f
font_01_sfnt_off0000faf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF2 10208 bytes
SHA-256: 811c6aee412c91607fe6966deda4110f42cc46f719bb7b422644499a56908197

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