Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6fcaf5e11a2ded…

MALICIOUS

PDF

75.3 KB Created: 2021-02-23 03:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c2e09c65d1da8a85c797f7bdf076a5d7 SHA-1: 1051e915f14ea657c2877810203bfbb5c0ff12be SHA-256: 7d6fcaf5e11a2dedac1ac7c90356c8730cf886620ec6e20da6cfed6563e1c451
126 Risk Score

Malware Insights

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

The PDF document is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a link farm with numerous external URLs. The document body, though partially corrupted, suggests a lure related to a 'John Deere 316 snowblower manual'. The presence of multiple external links, including one to 'baarspo.ru', indicates a likely attempt to redirect users to malicious sites for phishing or malware delivery.

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://baarspo.ru/aws?utm_term=john+deere+316+snowblower+manual PDF link annotation
    • http://tazizaj.iblogger.org/meduse.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/HNjajic/zifenogakumagi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491723/normal_6001e2155fe06.pdfIn PDF document text
    • http://goodnaturak.space/56216413992frhvs.pdfIn PDF document text
    • http://hookup157.fun/singing_in_the_rain_lyrics_englishh6ytj.pdfIn PDF document text
    • http://vefaporuzudu.iblogger.org/34713384171.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/eOoeghS/20895891465.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414494/normal_5fcd3b7a7a735.pdfIn PDF document text
    • http://idealica-it.website/finding_the_area_of_compound_shapes_worksheetobiy0.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
    • https://s3.amazonaws.com/tubukeganuji/buy_formal_dresses_online_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/zazesuxamisuxuxowogade.pdfIn PDF document text
    • http://rujipezoj.epizy.com/dark_alliance_baldurs_gate_ps2.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/baseball_games_pc_free.pdfIn PDF document text
    • http://beranaja.epizy.com/sentence_structure_worksheets_year_3.pdfIn PDF document text
    • http://rewogaki.rf.gd/yowhatsapp_mod_apk_terbaru_2018.pdfIn PDF document text
    • http://xajumin.epizy.com/48755265714.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/hold_my_beer_meme_template.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_off0000dbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB0 5408 bytes
SHA-256: e64fcd7972d46e7979fff3fbc414691cf66d525e022626098ca1394709c04ff9
font_01_sfnt_off0000ede6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 10592 bytes
SHA-256: dacee6c6984297c0a46af4e510a85287c2a0a5a20e77bee77ab8d73e8834e55d
font_02_sfnt_off0001122f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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