Malicious PDF — malware analysis report

Static analysis result for SHA-256 8799dd1b820fe1d0…

MALICIOUS

PDF

77.8 KB Created: 2021-04-02 18:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a8d82bc14a2b323d1fce21124c191f12 SHA-1: ee65433106b534c4122ea9da39be8e6979883cc0 SHA-256: 8799dd1b820fe1d0cbc6500aea323a40270dc8da87565827ff9b36571306f098
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with the primary one being 'https://seumenha.ru/wix?keyword=into+the+wild+chapter+questions+and+answers+pdf', suggesting a lure to a malicious site. The document body, though partially corrupted, appears to be a disguised attempt to trick users into visiting this URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/wix?keyword=into+the+wild+chapter+questions+and+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384639/normal_60492ee2479f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470027/normal_5ffb611ec4e0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403531/normal_5ff28e78a0a37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489237/normal_60149740ae3b4.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/ejbMih4/8_ball_pool_hack_iphone_6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472788/normal_600b902fe53c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477155/normal_5ff66994b67c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451556/normal_5fccf54f7e404.pdfIn PDF document text
    • http://girepodemaz.getenjoyment.net/vexipigebegesulagotimapur.pdfIn PDF document text
    • https://cdn.sqhk.co/retakabif/vhc1Urx/wesujodexajijesutobexuxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479688/normal_5fde892a23ec9.pdfIn PDF document text
    • https://cdn.sqhk.co/sesudegaruta/fgdfmwn/manhattan_gmat_reading_comprehension_strategy_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450044/normal_60352ee674c42.pdfIn PDF document text
    • http://faponabon.mygamesonline.org/35379624904.pdfIn PDF document text
    • https://cdn.sqhk.co/ximegawaso/jiCjcT0/69781291934.pdfIn PDF document text
    • http://xonigej.mypressonline.com/how_to_become_stock_market_research_analyst.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/incertidumbre_financiera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370299/normal_604d6fbbf08cc.pdfIn PDF document text
    • https://cdn.sqhk.co/razotefo/ifihifj/retro_box_tv_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492546/normal_60480fa672a53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503578/normal_600524e604328.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/27603f08-5064-4157-ae79-c194c1e0ce8a/what_size_coop_do_you_need_for_six_chickens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/060c1147-11be-4d3b-a7c8-b8f5524ee608/15499103526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8754808-14bc-4550-bc14-04ff7b87db78/fezisizeziwumawipave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b75e959-6612-4e68-a287-dafe4a3ed473/hard_phrases_in_spanish.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_off0000f2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D7 5396 bytes
SHA-256: d4474f9eb4e39906b9c13b59189d618e9fce4aa27d9231361d362375f57c58d2
font_01_sfnt_off00010539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10539 10536 bytes
SHA-256: 13ff37dde6cafed20a64ed359fdd86099b2e0dda8b95b75785d1baced989696d