Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f7a440acd873eb…

MALICIOUS

PDF

84.3 KB Created: 2021-01-22 23:19:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 41df7b611fd44fd41e8b0e19d884c4af SHA-1: 0a92f1ed3b3e51463176210c497a177c8e12006d SHA-256: f0f7a440acd873ebe72c3627512844db623e02a5973aa7c5d0f234e8b344f2b2
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 0.9998

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://trafffe.ru/aws?utm_term=apache+ignite+vs+mongodb+performance PDF link annotation
    • https://cdn.sqhk.co/sopiloroda/Kftjahg/stockmarketsim_stock_market_simulators.pdfIn PDF document text
    • https://site-1180946.mozfiles.com/files/1180946/78481618215.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/hcWHdHt/11947048402.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/4gfiglz/24026843427.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490133/normal_5ff5e8be7c113.pdfIn PDF document text
    • https://cdn.sqhk.co/lunapolakezo/6Kgh7wz/minerals_are_classified_according_to_their.pdfIn PDF document text
    • http://kuvuradivikosef.iblogger.org/analog_film_photo_filters_premium_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/j2hhvTJ/dynamo_sensitivity_for_pubg_mobile_emulator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427793/normal_5fd9e3ec8aef1.pdfIn PDF document text
    • https://cdn.sqhk.co/duzemata/VhiJGz2/nail_hitting_game.pdfIn PDF document text
    • https://cdn.sqhk.co/fijumirana/jjzihTz/34289652255.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369911/normal_60089f137e02c.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/gcidhfQ/amazon_music_spotify_oder_apple_music.pdfIn PDF document text
    • https://site-1190361.mozfiles.com/files/1190361/loan_agreement_template_ontario.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://femejedad.epizy.com/73873600321.pdfIn PDF document text
    • http://ribizotujigotok.rf.gd/logiruwonelak.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_off00010942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10942 5728 bytes
SHA-256: 613071c90a5bb64f751f003d51d3a218fe2ae97bef4cd6011ee1d6b822bd4d36
font_01_sfnt_off00011c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C95 11012 bytes
SHA-256: 09610c2d2ad7b54c7f08707dddb4ed2fa133aa52dddca1b2de855d6bf906eaaf

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