Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f32209e3d5ae09f…

MALICIOUS

PDF

74.1 KB Created: 2021-03-09 15:08:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f795ed5cacd8bd422a82afd9f617fc1e SHA-1: 8a3e90b35f63712cb6ad30d979006412c0392026 SHA-256: 8f32209e3d5ae09f10e895a638504051ad7a2fdc2b58ca6e76108af210a2f2bb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://jumiwimov.ru/123?utm_term=caudate+and+lentiform+nucleus PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454575/normal_5fe5d0dc18e51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_600fdebb65afe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_5fd2ca857f73b.pdfIn PDF document text
    • https://cdn.sqhk.co/lajoroteb/if0Pdgi/word_farm_crossword_cevaplar_28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474220/normal_6033fa626b08f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365560/normal_5fe044c0ab40e.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/ijghVih/14236606309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376380/normal_5fd92d0295b28.pdfIn PDF document text
    • https://cdn.sqhk.co/wolanojijen/bDgjiex/springtime_flower_pics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_6028ed3056ec5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402964/normal_5fd7daa058534.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/f3AdjcL/rush_hour_3_full_movie_fmovies.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/2e319f9a-959b-4e00-b3e5-bab98b5132b0/pidira.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/nevapusaganu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/653b90c3-760f-424b-bf9e-bb5dc96a5e3a/wabetitalufosogevuwuwav.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/35865531690.pdfIn PDF document text
    • http://jawikaginixuxuz.rf.gd/50708564551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b15823b-d69d-460d-a6ee-522b3615ee84/69162833864.pdfIn PDF document text
    • http://xigavekokerir.epizy.com/dark_souls_2_cheat_engine_item_id.pdfIn PDF document text
    • http://koxusaje.epizy.com/third_conditional_lesson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5c0f50-140b-43b1-a056-207eaf5fa40d/metamorphoses_ovid_summary_book_3.pdfIn PDF document text
    • http://gewapapis.epizy.com/atari_2600_pong_rom.pdfIn PDF document text
    • http://lijulipewagikev.rf.gd/27821660730.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_off0000e7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BD 5072 bytes
SHA-256: d65d574b744a32cc064a3d5cf3e4c6f619c5ff7b845a7b417faa370f6ba64c8a
font_01_sfnt_off0000f8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E3 10068 bytes
SHA-256: ef4eb78f43820a5f7ebf9a26116f180350d5590a2784c835fff11ea8dd9f8d8a

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