Malicious PDF — malware analysis report

Static analysis result for SHA-256 25116a93fbc233e6…

MALICIOUS

PDF

73.0 KB Created: 2021-03-16 02:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9f7a3d3eca2c671b927d66abcad38759 SHA-1: b7bc7cf01dac07a2f537e6cb91e58b545f6015ab SHA-256: 25116a93fbc233e675ac11a42fa1b76e0b1d96f210b5b8e0c640035844f7ab87
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document presents itself as a 'Ge front load washer technical service guide' but contains numerous external links, many hosted on disposable domains, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the heuristic flagging it as a link farm on disposable hosting strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=ge+front+load+washer+technical+service+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497687/normal_601728418b1e4.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/6471034.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/8eba76757ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392474/normal_5fdb2e92b0b2f.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/nawadigamatepugajosax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405945/normal_6009cef102301.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460060/normal_5fc7ff2983d0d.pdfIn PDF document text
    • http://shoes-storie.club/beautiful_background_music_freevqh15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448103/normal_5feb6b1a37e2f.pdfIn PDF document text
    • http://lg-supportteam.com/8065481813877nuv.pdfIn PDF document text
    • http://marketeuro.pro/132508474688stj8.pdfIn PDF document text
    • http://wizatone.iblogger.org/electricity_and_magnetism_worksheet_part_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jumepenitujox.atwebpages.com/jejavazazalamivarubus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38e8a143-8825-4982-a110-4ff7bd696e7f/bagezupokavusorinenaxofaj.pdfIn PDF document text
    • http://mipagolawalixa.onlinewebshop.net/worry_free_money_shannon_lee_simmons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a408da4-b5ef-4484-96c8-f2f457dd2e12/hoover_carpet_cleaner_parts_fh50150.pdfIn PDF document text
    • http://vesuduw.epizy.com/oster_5838_bread_maker_pan.pdfIn PDF document text
    • http://wisuvobere.epizy.com/bunip.pdfIn PDF document text
    • http://xusezoko.epizy.com/antenna_theory_analysis_and_design_3rd_edition_solution.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_off0000dfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE5 5464 bytes
SHA-256: bdce11982930a30d33a9e844868f3f21566dc852fee84a4f43bba2509bbea9bc
font_01_sfnt_off0000f297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF297 10544 bytes
SHA-256: ada17474e2b1f2107d90725317b63dee47e7ef6612c966f95956c84c8e386091

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