Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62b11ba38a95cc8…

MALICIOUS

PDF

79.0 KB Created: 2021-03-19 04:00:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e589e350c3b103f7bd153bff3453560e SHA-1: eb24e9348e0c89887ec7c25ce8de5985f8cc8de8 SHA-256: c62b11ba38a95cc8562d8c46e7fd67cc24ab480ee42f7a19a1bd957abdece453
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting a phishing or scam attempt. While no scripts were extracted, the presence of many external URIs suggests the document is designed to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=best+pack+n+play+with+bassinet+2018 PDF link annotation
    • https://cdn.sqhk.co/lizasizova/6OJjbyl/80s_rock_radio_stations_fm_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369632/normal_5fdea5e9b7b34.pdfIn PDF document text
    • http://sumomubidisuwo.iblogger.org/vikikagemutaxapefat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404108/normal_6013143c2bca3.pdfIn PDF document text
    • http://reactivascotia2020.com/new_fruit_pop_bubble_shooter_mod_apkgdnn2.pdfIn PDF document text
    • http://afracheat6.xyz/4759647646349oot.pdfIn PDF document text
    • https://cdn.sqhk.co/meparifemoji/hjiEihJ/86261691787.pdfIn PDF document text
    • http://instasurprise.online/legion_td_2_worker_guidet9o23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_60214c19f0149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448718/normal_5fd2878ef399f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_2f2255aaf996410dac76abbb46b227ae.pdf?index=trueIn PDF document text
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_96a36185e1bc4f70ac80b13d1c5cc744.pdf?index=trueIn PDF document text
    • http://wikilupari.epizy.com/hot_blast_wood_furnace_setup.pdfIn PDF document text
    • http://pesufebavarobi.rf.gd/map_skills_questions_and_answers.pdfIn PDF document text
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_2c98727103d14753b59a064ef084c3c2.pdf?index=trueIn PDF document text
    • http://turijebudeta.rf.gd/attribution_and_sports_performance.pdfIn PDF document text
    • http://sejanaxopuvogiw.epizy.com/worejaropatezuzame.pdfIn PDF document text
    • https://0793e221-2e7e-4176-aae8-4ff4b75d8f7a.filesusr.com/ugd/64bd79_fe860bf2d6b44b088ec25b765483ab3b.pdf?index=trueIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_090cbe9d3ae84e02ad90d3493ab7f537.pdf?index=trueIn 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_off0000f2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EE 5892 bytes
SHA-256: 566cfccb0450968d28a27b14976d27f053fd49a87b72f4a03556d483133c428d
font_01_sfnt_off00010717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10717 11136 bytes
SHA-256: 842861c678ab64b8195160444891b36c63f8b32e47e7b7b63675c8be545456b2

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