Malicious PDF — malware analysis report

Static analysis result for SHA-256 185ab60c9529d06a…

MALICIOUS

PDF

122.2 KB Created: 2021-02-27 18:19:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 962dc12c679049012aa1a016ad23b403 SHA-1: d2e4e26caf44a9bdd156bbd650d9a127556c3003 SHA-256: 185ab60c9529d06aec2f3dc3d589d416a33ccc0109ab77d14105cf64a86e769e
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and redirector infrastructure, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirector designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://dafemum.ru/strik?utm_term=john+dewey+el+pragmatismo In PDF document text
    • http://fiwisud.getenjoyment.net/call_me_by_your_name_full_movie_online_reddit.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/timex_expedition_indiglo_watch_strap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486351/normal_5ffd3761ad839.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/tUmsIji/kuvilewimelujofexufarinez.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/ajifEge/download_game_robot_crash_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444092/normal_601f268697739.pdfIn PDF document text
    • https://jufoximivovanad.weebly.com/uploads/1/3/4/0/134013024/2331762.pdfIn PDF document text
    • https://cdn.sqhk.co/tofigidukug/jdhcji7/nilivojaxaguzopi.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/1679070279.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/morelederewexufut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420235/normal_5fc778f7bd853.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/ridgid_belt_spindle_sander_review.pdfIn PDF document text
    • https://pavexoseg.weebly.com/uploads/1/3/5/3/135315086/mejekogaloseboku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506170/normal_6016e2fa6c4b1.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/ghh7Sge/discount_art_n_craft_warehouse_locations.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
    • http://dakafatuvuguviz.atwebpages.com/12570475950.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/89578557666.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_off00019119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19119 5344 bytes
SHA-256: 155d417834967f6685deb219e11cad325ef279efca9761f2037e0b6be9de09d5
font_01_sfnt_off0001a327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A327 12452 bytes
SHA-256: c6a77519cf7a6d99d183e20e937fd3b7e52a34f87a6de9b236051fa6f027b6da
font_02_sfnt_off0001cbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBF5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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