Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3e955b2514c4d1…

MALICIOUS

PDF

71.0 KB Created: 2021-02-04 06:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ad95d19bcff76f18ca84175cfd8470c3 SHA-1: 2373fa0d28397970131efcf6b2b223f4bd9e7524 SHA-256: 6c3e955b2514c4d12a435a07f74ac88b710fe8c13d77f3c880e96ba5cf174574
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, suggests a lure related to a 'business travel checklist template'. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://jottigo.ru/aws?utm_term=business+travel+checklist+template PDF link annotation
    • https://cdn.sqhk.co/vofudejobif/KDjgfhh/gem_heroes_game.pdfIn PDF document text
    • https://gekonoxare.weebly.com/uploads/1/3/4/4/134480638/wuzedular.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390382/normal_5fc68b5e86173.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/Qih7his/8711084307.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/6306124e4a8750a.pdfIn PDF document text
    • https://cdn.sqhk.co/daluzowinasu/gf2SgiS/fuxaviwewegune.pdfIn PDF document text
    • https://cdn.sqhk.co/kubasovusi/MSjdAgh/dude_perfect_net_worth_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/Phbghjx/rome_total_war_2_tips_battle.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390366/normal_5ff2893885d99.pdfIn PDF document text
    • https://funavekun.weebly.com/uploads/1/3/0/9/130969801/9613151.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495854/normal_5feef4d147c50.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/jijhcif/rotor_riot_mobile_gamepad_controller_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406169/normal_600dea2c24a6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kidoputuf.epizy.com/bst_time_now_24_hour_format.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/heart_beat_song_geeta_zaildar.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD967 5348 bytes
SHA-256: 2a11ec7be06dff575bf138acfa820a011ec5cdb9afbd04f547d0b6bb495f62b8
font_01_sfnt_off0000eb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6E 10692 bytes
SHA-256: 5e980ccf4c52fa0eee270d339f145c45ab80b3b88c45f4028994082a70b3c513

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