Malicious PDF — malware analysis report

Static analysis result for SHA-256 2703f23e980a230b…

MALICIOUS

PDF

84.6 KB Created: 2021-04-01 19:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c7fa7fe659877835adb56c048ee7ec08 SHA-1: 119c7ac03867d6995d24821095b1dc914289da0a SHA-256: 2703f23e980a230b0e6a169ed4ced6ee951abd08b2e1c155c48baf4f2bebe3a9
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to '2020 freightliner cascadia diagnostic codes pdf'. The presence of many links to disposable hosting and the overall structure indicate a link farm designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

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://zajinet.ru/award?keyword=2020+freightliner+cascadia+diagnostic+codes+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470220/normal_6010ffe85b60a.pdfIn PDF document text
    • http://filanion.online/64234104098pfzpc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476445/normal_5fe95f7a71a96.pdfIn PDF document text
    • http://ilkertr.shop/caveat_petitiongtgsg.pdfIn PDF document text
    • http://tomogorman.com/sinugowirowuxixx0chf.pdfIn PDF document text
    • http://nibelv.xyz/download_x360ce_emulator_for_pcwsylv.pdfIn PDF document text
    • https://xezefamije.weebly.com/uploads/1/3/4/3/134352880/lovotevizobi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_600ff68ec4f17.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/subiwa.pdfIn PDF document text
    • http://putifid.iblogger.org/82333422752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_604f6fa2430b2.pdfIn PDF document text
    • https://kegebexik.weebly.com/uploads/1/3/4/5/134590944/kujebiro.pdfIn PDF document text
    • https://rexakutomas.weebly.com/uploads/1/3/0/7/130739652/juximubaju.pdfIn PDF document text
    • http://jushq.club/how_to_make_a_commission_contract2h623.pdfIn PDF document text
    • http://uscreditmonitoring.info/46430364670sycwg.pdfIn PDF document text
    • https://wazolupagod.weebly.com/uploads/1/3/0/7/130775763/fopuxoworopojavel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/potofowanalaf.pdfIn PDF document text
    • http://bujapaf.epizy.com/part_time_evening_jobs_that_pay_well.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/concert_theme_powerpoint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/magazine_template_for_ms_publisher.pdfIn PDF document text
    • http://wegebemojawi.rf.gd/alfa_laval_separator_instruction_manual.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_off00010ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA6 5596 bytes
SHA-256: 071a3d48befc5a02e849348dfbccc782111e52c9bfee588b1fc9721929f9fe63
font_01_sfnt_off00011fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAE 11004 bytes
SHA-256: 21aa9eb1a20b90cb7370e9fa677b50bb1b57355082b235fc4cd35063efd33a8f

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