Malicious PDF — malware analysis report

Static analysis result for SHA-256 85bfcf597523351d…

MALICIOUS

PDF

82.7 KB Created: 2021-04-03 13:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8691693772f1d391a6042164c8773eaf SHA-1: d5d9e2737b7c5568c18fc2df3efd94d3cee760c7 SHA-256: 85bfcf597523351d5da71ea48af25a4a2c24d17e4f3f2edd28da4dc9a5845a44
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 0.9996

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://xezojetit.ru/strik?utm_term=harley-davidson-sportster-2014+service+manual.pdf PDF link annotation
    • https://lufetanajimub.weebly.com/uploads/1/3/4/5/134592974/tajukonagofu.pdfIn PDF document text
    • http://gordei2d.com/what_is_behaviorism_theory_of_learningg9y0w.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/36127000824.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/share_java_web_application3fio0.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/nemimunefatovesid.pdfIn PDF document text
    • http://ing-cliente.com/best_continuous_lighting_kit_for_portrait_photographydzrjj.pdfIn PDF document text
    • http://mylevel.store/63243551813gfjk6.pdfIn PDF document text
    • http://spain50off.info/dadotojilemapaxewolikafijjx2al.pdfIn PDF document text
    • http://poopo.ru/vb.net_tutorial_microsoftdmkq9.pdfIn PDF document text
    • http://dipugipedanam.sportsontheweb.net/nbte_curriculum_for_hnd_business_administration.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/62959331615.pdfIn PDF document text
    • https://kezidixujaroko.weebly.com/uploads/1/3/4/0/134040737/990843.pdfIn PDF document text
    • http://pixujuxe.mypressonline.com/saritelezi.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/71c298d5-4706-4519-80a4-cdfa19c00e5d/ncaa_division_2_football_all_american_team.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05f12010-11d5-40c0-83f2-d52be496b1f2/krk_rokit_8_g3_price_in_india.pdfIn PDF document text
    • http://rumaparulani.epizy.com/venugavakulex.pdfIn PDF document text
    • http://kazaxese.epizy.com/15583839572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c206aa-ac5f-4a73-beea-387207a94a77/jack_reacher_movies_streaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf46587-4956-431f-8c74-6edbd747bf5f/massey_ferguson_mf35_starter.pdfIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/99123020205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6bb47f-a978-4d34-8ae8-da2abf0bcab2/vurabutigedeva.pdfIn PDF document text
    • http://nowaginog.epizy.com/doraemon_francais.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_off000103b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B4 5900 bytes
SHA-256: 0609206e55359fbbda604924480c7b47feffa58c0466bb89b320ee6557bf277b
font_01_sfnt_off000117db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DB 10916 bytes
SHA-256: 65ef0e6c84839d0e97a31f0db887ebbd1cc5378b4a26ba3e63df325c86b4160f

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