Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7651fe6eca8032…

MALICIOUS

PDF

75.7 KB Created: 2021-03-02 11:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 91e58768a229937e5cf7b741e444a531 SHA-1: 16b0174fd1cd130b855b48b13685b12b4d7070ab SHA-256: 6e7651fe6eca8032dc9ed9642620089d2af573d33c86b904379c5ee7312af570
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics suggest the PDF is intended to redirect users to malicious websites, likely for phishing or to download further payloads.

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://fokemale.ru/strik?utm_term=do+punctuation+go+inside+quotes+uk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495065/normal_60252ae79deb3.pdfIn PDF document text
    • http://ecoterritory.store/gesebavamanodeferuvox9bd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366665/normal_5ffda5a801415.pdfIn PDF document text
    • http://maska-respirator.com/mubogobevopujgw3qe.pdfIn PDF document text
    • http://biomaniix.website/e36_repair_manualo6hn2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485714/normal_602877d349fd7.pdfIn PDF document text
    • http://kleomaften.online/lava_omnidirectional_4k_tv_antenna_hd-80088esv2.pdfIn PDF document text
    • http://auto-fishing-rods1.club/95959784064bllvf.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/hsXzadX/wixaluxirujidorororizefe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490122/normal_5fff3e563fab0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kibululugavi.epizy.com/settlers_of_catan_strategy_and_tactics_guide.pdfIn PDF document text
    • http://momoxorepuvo.epizy.com/22092733797.pdfIn PDF document text
    • http://wifotomosif.epizy.com/payment_request_form_example.pdfIn PDF document text
    • http://jezagap.epizy.com/best_free_mailchimp_newsletter_templates.pdfIn PDF document text
    • http://litorow.myartsonline.com/91737557380.pdfIn PDF document text
    • http://xebedosifemopan.epizy.com/macbeth_act_5_scene_2_translation.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_off0000ea78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA78 5304 bytes
SHA-256: 57d769ad2074d1e4b819bca0863d7fd062485dec94b3d9c2203702b95403610f
font_01_sfnt_off0000fc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 10876 bytes
SHA-256: cb0b6cefa7aa976abeecfa9569e31dc3be98e4b2c53cce5891211834897888ac

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