Malicious PDF — malware analysis report

Static analysis result for SHA-256 3469d2a42fc95942…

MALICIOUS

PDF

89.0 KB Created: 2021-03-17 03:07:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6c237b2ce91ee558c8c352fde6a50ee7 SHA-1: 11660be25e4eeb57e7d17053a13c18c2e7916b0d SHA-256: 3469d2a42fc95942d828e935d5c968ddada977af768ebdf5eb327134298b18b0
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The primary purpose appears to be directing users to external content, potentially for SEO manipulation or to lure them into malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=mabinogi+alchemist+guide PDF link annotation
    • https://cdn.sqhk.co/wufotubi/Hglgghe/pet_cambridge_exam.pdfIn PDF document text
    • http://gipurasov.iblogger.org/andhra_university_distance_education_exam_time_table_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rusefijow/gjehfgd/algebra_solving_equations_1ma0_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/zimajigon/jgzjaQg/gesijevafewodatu.pdfIn PDF document text
    • http://bepifukikuku.mygamesonline.org/zunubafinotilude.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/dbgifjc/get_lucky_2019_movie_english_subtitles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459324/normal_5fd26265a6495.pdfIn PDF document text
    • https://luvemolovod.weebly.com/uploads/1/3/4/3/134305721/xigajila-safugafaguseb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_5fe7507bdff7c.pdfIn PDF document text
    • https://kibodoru.weebly.com/uploads/1/3/2/6/132695707/sewus.pdfIn PDF document text
    • http://mamafiposorugul.sportsontheweb.net/kelinalanezodinuxajixez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389365/normal_5ff0d564a0ae7.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/functional_analysis_m_thamban_nair_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/pXhfEhg/go_launcher_apk_premium.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/c3ik86e/hattrick_youth_club_training_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/visunexabore/giZogd2/mikubuturotepav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://manepiri.epizy.com/new_shooting_games_2018_android.pdfIn PDF document text
    • http://tozoduva.rf.gd/adobe_illustrator_retro_poster_template.pdfIn PDF document text
    • http://datonojafasaxup.rf.gd/75614284655.pdfIn PDF document text
    • http://ralenosozizog.epizy.com/xemowevezowuvowavomo.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_off00011480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11480 5400 bytes
SHA-256: 28686e65cdfd9cf09580c87555596aa305ec8a8025f6ead837aefb4dad30dc55
font_01_sfnt_off000126c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C3 14404 bytes
SHA-256: eb7ff4ee4e16e74180f40bd6a23dcdc30647d1e477108f48ad14cd0010bd6cb2