Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ffc2e246d7dca9c…

MALICIOUS

PDF

73.7 KB Created: 2021-02-28 02:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf80a0377df4358cb0070af29046f456 SHA-1: 48abf88b9270fac7d2d2321f4d4f36c7085633ce SHA-256: 8ffc2e246d7dca9c1671e76a5dc5033630dc6519d26a2e8eb44688c0799f6853
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. The document body, though heavily obfuscated, contains keywords related to vehicle specifications, suggesting a lure to trick users into visiting malicious sites.

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://ponafet.ru/123?utm_term=2013+jeep+grand+cherokee+3.6+overland+specs
    • http://collegegraduatecentraldating.com/e_myth_mastery_worksheetssonge.pdf
    • https://cdn.sqhk.co/fofotixoz/iicgTsY/n64_emulator_switch_download.pdf
    • http://gajaxujifusokul.mygamesonline.org/getin.pdf
    • http://mavigawika.scienceontheweb.net/77327096841.pdf
    • http://zelopaqq.xyz/how_to_factory_reset_nighthawk_ac19000cma7.pdf
    • http://fakts.design/fuzaposurapawiwabig62a0v.pdf
    • http://help-nanny.site/30023736321jipwq.pdf
    • http://heleogose.online/background_blue_pic5q6eq.pdf
    • https://cdn.sqhk.co/xasexuwosul/4XQgjj8/golowopikiramenoleweka.pdf
    • http://gejokakop.mygamesonline.org/27709050609.pdf
    • http://weareanonymous.org/jerarqua_de_valores_de_max_schelerlenm3.pdf
    • https://xovozenoz.weebly.com/uploads/1/3/4/3/134348708/pigaripo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/silubebebefuju/ain_t_no_sunshine_guitar_chords.pdf
    • http://wugujub.onlinewebshop.net/what_is_lean_toyota_production_system.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d435.bin
78a89196973389a9b63ef3082ea781fc747a5bb6a45ff6dd3b8b26c8e71500a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD435 5776 bytes
font_01_sfnt_off0000e7cf.bin
9bd57543b7225b5219ef436d9ea6523432c71c8a4175ec65f100f824e99a2c3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CF 10736 bytes
font_02_sfnt_off00010be1.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE1 4324 bytes

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