Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f608132e334b36…

MALICIOUS

PDF

80.9 KB Created: 2021-03-14 07:48:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 68cd58de55ce05369d927f8acc55f3ea SHA-1: c2c6bcb219ada9ab7dbc51db077808c7943d8bda SHA-256: 22f608132e334b3645c8b4338ca7bc53c7e8d2b30069fc04900bfdfaee420cf1
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily corrupted, contains keywords related to lease agreements, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/123?utm_term=housemate+lease+agreement+template PDF link annotation
    • https://munerojepoges.weebly.com/uploads/1/3/4/0/134042508/mofinujopetit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411944/normal_60214a0854c55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384149/normal_600d8d1eebebc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473642/normal_602b0b9305a94.pdfIn PDF document text
    • https://kewegiru.weebly.com/uploads/1/3/1/4/131438086/2f53acbca983635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481055/normal_60467a6221715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_60325ffe400a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415326/normal_5fe172166b0a4.pdfIn PDF document text
    • http://roburupagosode.iblogger.org/search_fors_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382412/normal_601a75b168f4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_604632cf717f0.pdfIn PDF document text
    • http://rituwomijemof.iblogger.org/blizzard_slow_2018.pdfIn PDF document text
    • http://pisodanijuke.iblogger.org/boxing_star_gym_guide.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/8064ebf6-7c30-4b6a-904c-201241f7235c/31028430365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/483c960e-c34c-42ee-b7e5-bd812c022ced/66069380918.pdfIn PDF document text
    • http://marakolin.epizy.com/runedinixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1600f883-74af-4622-bf9a-ec1df2bed273/the_god_ask_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd629ba-a7dc-4108-bfb9-4df7d7971736/65913532965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/920d9599-fdfb-4dd7-a44a-e63cddab8b60/amr_hr_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc215e5c-23e1-4b10-93f1-be245af2f86b/do_you_have_to_pay_a_cancellation_fee_at_planet_fitness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf00076-5aeb-4178-9cb5-bc874f789385/black_and_decker_electric_weed_eater_restring.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_off0000fdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAF 5100 bytes
SHA-256: 6bbca7ea20183a4a6e7d2316b8d0f60de8d0e542d35c79ff949a9fbb5e6b6851
font_01_sfnt_off00010eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEA 11124 bytes
SHA-256: e27a2542f84b21b7271fd3b6f726699ac4ae71ce6e8001b2f6c9def25853fc85