Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6fdc749e4eaaaa…

MALICIOUS

PDF

74.8 KB Created: 2021-04-03 15:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ad513d76832fa506ac99aa35dcf8bf0c SHA-1: add58c224195cdd84cf7320094c6beb2ead062d0 SHA-256: 6e6fdc749e4eaaaa1265247825115008514fce67735781121d58f5aeaaf70637
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting an attempt to obscure the true malicious destination. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/award?keyword=boundary+survey+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405206/normal_603b6fbd82784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5fdc6dede2911.pdfIn PDF document text
    • http://fofafik.iblogger.org/gegaviduro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412902/normal_6042c1c48203d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505839/normal_602a04aaa7e7d.pdfIn PDF document text
    • https://cdn.sqhk.co/juzexokogim/ggdigGa/card_throwing_trick_shots_david_dobrik.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/2fjdugc/candomble_religion.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/5ji01ij/93306615397.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/gdsjihf/41947234165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_60134773cebb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sewewixa.epizy.com/jump_zone_14ft_round_trampoline_with_dunkzone_basketball_hoop.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_6b8f5ef3e40b42bc963a9cb61515b3bd.pdf?index=trueIn PDF document text
    • http://melamepapate.rf.gd/81295365408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ce84e70-b303-45e4-a1a4-48d7a4ac3715/vocabulary_workshop_level_blue_teacher_edition.pdfIn PDF document text
    • http://fububosuvakosal.epizy.com/button_mushroom_spawn_production.pdfIn PDF document text
    • http://jujadax.rf.gd/7620669974.pdfIn PDF document text
    • http://domulogud.epizy.com/58464004803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea3d035e-f5d0-459c-9d99-d55007064864/best_stocks_for_beginners_2020_uk.pdfIn PDF document text
    • https://99b08629-27b2-41dd-83a1-938dc2ca35bd.filesusr.com/ugd/067ecb_00812e70e9d24c8e9e626728e59e832f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/085c57c9-3c6d-42ea-87f7-81e12c0bb937/fender_mustang_v2_guitar_amp.pdfIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_21dfd4bea0014c63ba6a6caed687e9de.pdf?index=trueIn PDF document text
    • http://xeziribosivamis.epizy.com/brevet_college_2019_report.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_off0000e741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE741 5216 bytes
SHA-256: 274ebd7e21eabb67303c25a859d1e37babd7b94744a9a68b20ea9127b3df6263
font_01_sfnt_off0000f921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF921 10888 bytes
SHA-256: db0ded72215e0aac661f953a7feaf4317c1849eb7ee8664482495622e7c49524

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