Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba774be15e6907a1…

MALICIOUS

PDF

75.1 KB Created: 2021-03-07 12:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 09e16b159afc5ac1b724b9f009ae54a4 SHA-1: e67d952fdc907fb8054b3acd4ed975f0a9c9f696 SHA-256: ba774be15e6907a11152ee55f15703d68c49ea77b326252d614b1b08e28c253d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external links to other PDFs. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded links suggest an attempt to redirect users to potentially malicious or phishing content, masquerading as search engine optimization content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=brother+2270dw+drum+reset PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474206/normal_5fe4bdf843469.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/ibD18pB/games_like_zombie_farm_battles.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/vyyjigi/langrisser_mobile_sea_redeem_code.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/jbjcidQ/65276130020.pdfIn PDF document text
    • https://cdn.sqhk.co/lesepivir/qhfighh/pemowawi.pdfIn PDF document text
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/9870223.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/47601a9034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_60372bc97b8e3.pdfIn PDF document text
    • https://cdn.sqhk.co/rirelolut/hgGSchj/jump_and_shot_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzexesetaba/iahchig/alexander_dawn_of_an_empire_similar_games.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/JKrFhim/72991791670.pdfIn PDF document text
    • https://kowezuvive.weebly.com/uploads/1/3/4/6/134603832/sakan.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/jH1iiD3/mufidezovunumepasumo.pdfIn PDF document text
    • https://bexaxaxaf.weebly.com/uploads/1/3/2/6/132682125/kopemin_narejoribaw.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/gi72ien/super_kart_racing_trophy_3d_ultimate_karting_simulations.pdfIn PDF document text
    • https://cdn.sqhk.co/xosuridasago/ahVq3fz/upcycled_wedding_dress_images.pdfIn PDF document text
    • https://cdn.sqhk.co/tagodepa/gighg1m/magdalene_sisters_movie_streaming.pdfIn PDF document text
    • https://cdn.sqhk.co/bopesajan/t0lhj3M/gikeduwisedukoragosadela.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/jakibey/8828178156.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://fikuputo.epizy.com/31510838796.pdfIn PDF document text
    • http://gupupofof.rf.gd/79060235876.pdfIn PDF document text
    • http://kewoxorewozox.rf.gd/tumulemavadig.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_off0000dd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2A 5048 bytes
SHA-256: 46e66e1b6e819b47d3117ea5aba32ecf5dd942b2a74b38177c2c6e7cb14da8df
font_01_sfnt_off0000ee70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE70 10136 bytes
SHA-256: fb7e9d1f70e0bb7e4881c6da916b6669d3a53d4c596c721e40bee2bc404460d2
font_02_sfnt_off00011132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11132 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2