Malicious PDF — malware analysis report

Static analysis result for SHA-256 f588ea76bcdb4ab6…

MALICIOUS

PDF

65.5 KB Created: 2020-11-14 12:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 107476f78a6e4b2b963a1bf531fffbb3 SHA-1: 17b5c2084f6badacd97f9785cacef3f2386d7cd5 SHA-256: f588ea76bcdb4ab6cd15cd726b68b7c1af964c75e9e66e8b4b6440e8ab6d420e
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting services, and one specifically lures users with 'carx drift racing mod apk'. The PDF structure and embedded links suggest it's designed to redirect users to potentially harmful websites for phishing or malware distribution.

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://trafffi.ru/123?utm_term=carx+drift+racing+mod+apk
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/kisesajotikevezi.pdf
    • https://zadiletewus.weebly.com/uploads/1/3/4/5/134522124/5f26054219bdd.pdf
    • https://cdn-cms.f-static.net/uploads/4404964/normal_5f9f89754eb05.pdf
    • https://dojarugakafep.weebly.com/uploads/1/3/4/4/134471698/44ab2f76f3.pdf
    • https://bogemokized.weebly.com/uploads/1/3/4/3/134386998/nikireji_powig.pdf
    • https://cdn-cms.f-static.net/uploads/4376382/normal_5f9794012d590.pdf
    • https://zolezuborejizo.weebly.com/uploads/1/3/4/4/134444688/lutimeziv.pdf
    • https://cdn-cms.f-static.net/uploads/4385647/normal_5f92f250ca480.pdf
    • https://tifobavojosimiz.weebly.com/uploads/1/3/4/5/134505066/libodemeg-kanixarunu-kitaxaboru-xiselafofopolis.pdf
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5f934c31673b9.pdf
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/79aca56bdf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/loneminovu/vinacafe_coffee_mix_nutrition.pdf
    • https://uploads.strikinglycdn.com/files/6cb99c7a-d973-484a-9555-affe1e4ea892/cactus_mccoy_3_game.pdf
    • https://s3.amazonaws.com/gorajikunobixi/wowavisewatajojum.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c44d.bin
90da40cf04e2904a3cff20c7d25ae9279756a570c52c0b35d74acbcc68750752		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC44D 5300 bytes
font_01_sfnt_off0000d64d.bin
ae3f74979ff61e7cb9015d86690f5602500b431621c19839e0bfe96d0de8d182		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD64D 10204 bytes

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