Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb671d9a0afc18a…

MALICIOUS

PDF

74.8 KB Created: 2021-02-22 00:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 843221d433423fea419f37b0a341742a SHA-1: b51478d109c34a1a2b392a38fa5052b5a288d861 SHA-256: 0cb671d9a0afc18a7f281422ef26df2d042220def6b0dfeff3c8f0992ed306c3
184 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics, including a critical alert for a malicious redirector link and ML classification. The embedded URLs and the document's structure suggest it functions as a link farm designed to redirect users to malicious sites, potentially for phishing or malware delivery. The presence of a deceptive title related to a 'travel trac century v fluid trainer review' further supports a social engineering pretext.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=travel+trac+century+v+fluid+trainer+review In PDF document text
    • http://bobr.space/27231303771k3bqi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496815/normal_602173ac6425c.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/Zaghgds/ponoxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471514/normal_5fc894764c3de.pdfIn PDF document text
    • https://cdn.sqhk.co/sorubajuzoxe/q6Tgcgg/hitman_golden_handshake_vodka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_5fd98a3b912ec.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/iamjhFT/hungry_shark_sniper_3d_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/qvkhcih/govakaruwawawilumexataki.pdfIn PDF document text
    • https://cdn.sqhk.co/mowefakura/PhfsGga/how_to_make_paper_squishies_step_by_step.pdfIn PDF document text
    • http://givepamodugag.22web.org/73556553920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_60329b700d510.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/kjiiijg/stickman_battle_royale.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
    • https://s3.amazonaws.com/bejokazemur/celestial_bodies_book_free.pdfIn PDF document text
    • http://dabemekos.epizy.com/40786257015.pdfIn PDF document text
    • http://lisevazoni.rf.gd/kedibonorasokoda.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/pogobagotukejiwuludasise.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/all_hollywood_movies_2018.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_off0000da65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA65 4812 bytes
SHA-256: 6b5e0bb4e6254595f50697c34d1c04638f9d62e8cdac3460b7281293aa9ab4ed
font_01_sfnt_off0000eae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE1 10680 bytes
SHA-256: 0ddf1c348d17b793ad8af2470ceee8753168a80784df3a0703c1a5f3334c64bc
font_02_sfnt_off00010f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F74 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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