Malicious PDF — malware analysis report

Static analysis result for SHA-256 85edceb1451a46f3…

MALICIOUS

PDF

78.5 KB Created: 2021-03-06 18:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8ac481dea2a8b924b044b9dcea07dcf4 SHA-1: ddc69b1c113411a9078e13ed1267934a2bd0e39f SHA-256: 85edceb1451a46f38b0aa48d3323f92a73313ddbd0ba0ffc3dac1f9dc0a8f858
126 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 pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The presence of external URIs and link farm characteristics suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=hitachi+c12rsh2+review PDF link annotation
    • http://goodshopsales.xyz/problem_and_solution_essay_examplesd8ucs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_600f72b6470fd.pdfIn PDF document text
    • http://copyright-help-report.com/kali_linux_nethunter_rootless_editionmgiqe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486220/normal_603f47e04a601.pdfIn PDF document text
    • http://betflixguvenilirmi.com/lucina_guide_smash_4ffyaa.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/wapixefowiz1jvo5.pdfIn PDF document text
    • http://kyukty68.xyz/beats_x_troubleshootingaoevy.pdfIn PDF document text
    • http://tixshopclub.space/conan_exiles_how_to_spawn_thrallsaiyfy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5fda615af3066.pdfIn PDF document text
    • http://sovetnik53.ru/29889910078ftok0.pdfIn PDF document text
    • http://azorocheat6.xyz/38107038789xyiww.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487927/normal_602f624a9b79b.pdfIn PDF document text
    • http://samo-katim.ru/dragon_ball_episodes_in_tamil9gvoc.pdfIn PDF document text
    • http://rkconstructionsucks.com/vegojelisap0bgtg.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/fire_emblem_three_houses_tier_listvgjtk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486565/normal_5fe7e4d6164c4.pdfIn PDF document text
    • http://ekbsite.ru/thermo_king_apu_dealer_near_mewdp5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3cdae64-8f49-4014-8c50-832b576ad236/mofefugikuvovimopumenes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a61d5d6f-9bc5-4183-b66f-f58a5b68cbee/30851137460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e347aa8-b272-4f9d-8352-d359c68e9ddb/sat_practice_test_10_writing_and_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e83d5f49-87b7-41ea-ad00-eb2673e1f71c/the_secret_history_of_wonder_woman_jill_lepore_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0469040b-4e8b-4ecf-a89b-ea49a7501c50/behringer_q802usb_xenyx_premium.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65B 5152 bytes
SHA-256: 08f9954eb63802640162f50bfae293267c743ef7e923cda8ec369e2949e9fb6e
font_01_sfnt_off000107f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F1 10808 bytes
SHA-256: 6b5d6fee2f9318734a03e048d6d54bc72e12bdd0e39c80f72dbeb4cfbb89f715

Open this report in the interactive analyzer, or submit your own file for analysis.