Malicious PDF — malware analysis report

Static analysis result for SHA-256 068ba64cdeada16e…

MALICIOUS

PDF

69.3 KB Created: 2021-02-12 05:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 57b187857721868aa2cce6efe8d707e1 SHA-1: a78a73472537b5a4f187770e75e5c6048993dda5 SHA-256: 068ba64cdeada16eaeac92dd27b7b6b07fe9cb9eb23c31096dfadd1e7ce18d19
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent.

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://druttle.ru/123?utm_term=broadcast+journalism+colleges+in+minnesota PDF link annotation
    • http://flathead.us/fulomugxydpi.pdfIn PDF document text
    • https://dudegakabiwuzab.weebly.com/uploads/1/3/1/4/131406663/rizamo.pdfIn PDF document text
    • https://xamatetafuxu.weebly.com/uploads/1/3/1/6/131606968/busipaxuwolop_tibitexigal.pdfIn PDF document text
    • http://6gusevshop.space/93892113105200l1.pdfIn PDF document text
    • http://mkr-olimp.info/fluid_resuscitation_guidelines_in_septic_shockvguy7.pdfIn PDF document text
    • http://proita.space/gamudupexoxamuledubobijo2tbio.pdfIn PDF document text
    • http://yesnutural.space/three_types_of_catapults5ipax.pdfIn PDF document text
    • http://eslivdrug.space/dopegudorezirovopowumefuyd3tf.pdfIn PDF document text
    • https://vidiguwases.weebly.com/uploads/1/3/4/3/134347373/567110.pdfIn PDF document text
    • https://rikedinodewo.weebly.com/uploads/1/3/5/3/135323941/2461726.pdfIn PDF document text
    • http://proita.space/driving_games_apkpurecl9dy.pdfIn PDF document text
    • http://powerpoint4you.ru/858539841982qjhx.pdfIn PDF document text
    • http://1s.london/mapa_iberia_tomtom_xl3f452.pdfIn PDF document text
    • http://openchambre.xyz/8678736613563k7p.pdfIn PDF document text
    • http://frukt.space/588909030275gceq.pdfIn PDF document text
    • https://dazenesulamese.weebly.com/uploads/1/3/1/1/131164173/katuvo_zusepomafi.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/gosete/cat_and_dog_hollywood_movie_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/text_structure_chronological_order_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/tamil_nadu_land_guideline_value_revision.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/simple_present_tense_exercises_for_beginners.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_off0000d077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD077 5384 bytes
SHA-256: 34d07e56658b03e5c8600c1bf31ba679af93c064de5e349f707b19bf93fb061f
font_01_sfnt_off0000e2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B7 10848 bytes
SHA-256: 47abda1656ae455178fe442ae9131bb96e1481e0d34d8f58e0f82077e051661c

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