Malicious PDF — malware analysis report

Static analysis result for SHA-256 e468451450c0a724…

MALICIOUS

PDF

75.2 KB Created: 2021-03-28 13:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 81c01eee75dc5365d15943c77ea1d37b SHA-1: 8b7993f726003334400cbee4927ed51d9569f955 SHA-256: e468451450c0a724ce980b8e19f89ea6f18e8b134f08375a4baeca3a7f731774
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/strik?utm_term=what+workout+burns+most+calories+on+apple+watch PDF link annotation
    • http://artistichomesolutions.com/nike_air_force_1_pixel_wei_beige_schwarzknvd1.pdfIn PDF document text
    • http://nomuvafemokin.iblogger.org/72989926552.pdfIn PDF document text
    • http://energytik.net/55256942313szomx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463010/normal_60212abf05645.pdfIn PDF document text
    • http://marketeuro.pro/smoothie_recipes_with_spinach2gjuv.pdfIn PDF document text
    • http://creditscorehelp.info/warhammer_fantasy_roleplay_2nd_edition_racesi9pry.pdfIn PDF document text
    • https://ludikunoxor.weebly.com/uploads/1/3/5/3/135345671/8408282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479938/normal_605481e2dc6e9.pdfIn PDF document text
    • http://weraka.online/how_to_put_together_a_graco_lauren_classic_crib5ixaz.pdfIn PDF document text
    • http://sizijevoji.iblogger.org/new_best_silent_songs.pdfIn PDF document text
    • https://nifebupamej.weebly.com/uploads/1/3/1/6/131607321/9277589.pdfIn PDF document text
    • https://sevimuxeso.weebly.com/uploads/1/3/0/7/130739978/2714259.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384050/normal_5ff1f36b643cc.pdfIn PDF document text
    • https://zorovapi.weebly.com/uploads/1/3/2/3/132303286/04886cdd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fezajeb.epizy.com/51946170278.pdfIn PDF document text
    • http://finubovuputok.epizy.com/boiler_and_its_classification.pdfIn PDF document text
    • http://dixisafujanen.rf.gd/82957841.pdfIn PDF document text
    • http://ledojiwibobuva.rf.gd/825819116.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/11640602293.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/36834227465.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/19521877238.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_off0000e7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D1 5480 bytes
SHA-256: 0dfad4187e034e99d2773b52819b545a6a56034c64c3381f4425a73e972d3fb3
font_01_sfnt_off0000fa5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5C 10832 bytes
SHA-256: d527616778b14170b417e933b28888080c7a4f9df33d6ff61573e674d15cc975

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