Malicious PDF — malware analysis report

Static analysis result for SHA-256 668522b4f299cf76…

MALICIOUS

PDF

91.2 KB Created: 2021-03-08 21:07:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2cde71657765deb495bb2616549f70b2 SHA-1: df07a41a481cbc85bd9f6f4382d14d77c8f6340d SHA-256: 668522b4f299cf76cf685ae0d7a4ba3488c830878a2737394c79e4f77fe80bc3
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a strong intent to redirect users to potentially harmful content. The presence of external URIs and the classification as a link farm strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://dugedepap.ru/aws?utm_term=all+my+sons+play+setting PDF link annotation
    • https://zebakikalelu.weebly.com/uploads/1/3/0/7/130775248/7050102.pdfIn PDF document text
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/dovobegi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416918/normal_5fe8e084b73dd.pdfIn PDF document text
    • http://ketosimple.online/44613655390jlf2.pdfIn PDF document text
    • http://wildboost.club/sentence_fragment_worksheet_grade_63v15w.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/6377718.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/82066f28.pdfIn PDF document text
    • http://handler-autoscout24.com/internet_speed_monitor_pcfkomm.pdfIn PDF document text
    • https://cdn.sqhk.co/zonurubo/GjdK0gD/lumosity_brain_training_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nabotogemobe/YojdUdZ/rokedubaxusejijam.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/nigjh7u/farm_animal_colouring_pages_printable.pdfIn PDF document text
    • http://itanto.space/naseleyqn14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374847/normal_5fcd77507ca1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454286/normal_5ff6b9aa23fe0.pdfIn PDF document text
    • https://mejuxubewa.weebly.com/uploads/1/3/4/0/134041058/260ce6a31bea190.pdfIn PDF document text
    • https://cdn.sqhk.co/nonagidux/fhj9hij/93997041204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370764/normal_5ffd7181efa0a.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/gemiea1/todo_cuenta_letra_y_acordes.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/ainhhuG/rhythm_nation_1814_vinyl.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/ahMghii/video_player_android_github.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_603cf7e3616e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pusori/desalap.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/dls_18_hack_profile._dat_file_link.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_off000128d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D8 5132 bytes
SHA-256: 41bcda4d49095cf6e8f1ca14c61971d66599d5c8fff30e435c6d48b641ac1791
font_01_sfnt_off00013a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4C 10880 bytes
SHA-256: 9157e210409c8e5459f805936686d08d6f570d4976f9f97caddff3f9d923197f

Open this report in the interactive analyzer, or submit your own file for analysis.