Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b2e4746a1b55ac…

MALICIOUS

PDF

80.0 KB Created: 2021-03-22 07:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4c0981489adb22bad5aa65f6c9a4beb1 SHA-1: cb96ecae97ea7ad72f378992856d7d2a89d939f4 SHA-256: e0b2e4746a1b55ac1ef38cb21b9a933e7b834b6f8821ce84fe7083be47784234
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://bologen.ru/123?utm_term=angular+schema+form+validation+message PDF link annotation
    • https://cdn.sqhk.co/sopaluwokaja/eYilbhc/31663147322.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470224/normal_5fec20a38092b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501993/normal_5fc8cf2d585ab.pdfIn PDF document text
    • http://tetizeniwa.mypressonline.com/57882548040.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/problems_as_opportunities_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/naveropifo/hxhbrjj/island_of_the_blue_dolphins_book_map.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/fkXtibn/find_my_friends_freeze_location.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412582/normal_5ffececdcb1a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489722/normal_5fd205e736aff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_5fe81f807349c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371020/normal_600408d9916ae.pdfIn PDF document text
    • https://cdn.sqhk.co/wanowofimaz/jebNjjM/insaniquarium_deluxe_feed_fish_fight_aliens_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/ry7Eih6/wisuvesitesoripoguzoxedu.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/gchcghZ/farm_day_village_farming_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/kevapaboxer/giQif67/juzisunipufezawazabiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482882/normal_6029ed7837744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_6040c54b6a753.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/j7Tiahi/infection_fatality_rate_covid_19_by_age_group.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/a7EgjeA/23831264641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498882/normal_6039d704d2851.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/ggdpENm/melody_thomas_scott_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kenesowozowojaw.myartsonline.com/judul_skripsi_akuntansi_perpajakan.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/newspaper_article_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/mewozedunadebogukifupovil.pdfIn PDF document text
    • http://ruzakema.onlinewebshop.net/brgschaftserklrung_miete_muster.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/sovuseb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 5368 bytes
SHA-256: 1184e473b3e9bd46ff4b822e85ed6958c8019d35a0dd9888b8f084da2d48270b
font_01_sfnt_off0000fac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC0 11528 bytes
SHA-256: 43e76e9719149f14b721da0bdd68db3fb31c53cd251f28efbf3047a8c493380e
font_02_sfnt_off0001223f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361