Malicious PDF — malware analysis report

Static analysis result for SHA-256 364ff7e6259bcbbb…

MALICIOUS

PDF

74.4 KB Created: 2021-01-12 17:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f48c2c5082b656b79d78ca560d4a683a SHA-1: e90682de605c9d285ef617afa5d34e2027aeb20b SHA-256: 364ff7e6259bcbbbd2aa5d919a503e5e1f392ab7bfd4864e7b416b3d808b28c9
214 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to redirector infrastructure and potentially malicious content. The heuristic firings indicate it is a malicious redirector and part of a link farm, designed to drive traffic to external sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=last+day+on+earth+generator+gas+station
    • https://bovuxugiz.weebly.com/uploads/1/3/4/9/134901291/taxesave_nimevupeji_bizozukaz_mumarotoz.pdf
    • https://cdn.sqhk.co/nivipanevi/jiwjj5m/84790837382.pdf
    • https://cdn.sqhk.co/lukedivibeb/2Cs1ifE/ghost_rider_2_cast_members.pdf
    • https://cdn.sqhk.co/xifusajexom/gAGgeoY/knife_hits_3d_print.pdf
    • https://siwevobone.weebly.com/uploads/1/3/5/3/135317475/dd90b2663c.pdf
    • https://site-1190022.mozfiles.com/files/1190022/top_open_world_games_for_android.pdf
    • https://site-1173381.mozfiles.com/files/1173381/lakuwofawatinulomutuwaxok.pdf
    • https://cdn.sqhk.co/kaxejelun/hvG31he/wedidumovukuk.pdf
    • https://site-1083772.mozfiles.com/files/1083772/runescape_spirit_seed.pdf
    • https://zelogevoge.weebly.com/uploads/1/3/1/4/131483318/xedebetejidaxafolaja.pdf
    • https://cdn.sqhk.co/xanodujijefu/cOOgVjg/ketunitodotejifit.pdf
    • https://cdn.sqhk.co/joduragenep/FoANjgh/idle_armies_mod_apk_1._18.pdf
    • https://site-1172723.mozfiles.com/files/1172723/download_mod_fun_hospital_tycoon_is_back.pdf
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/vojuwil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mexesazaxasa/xutafoxuregarasewiviritaf.pdf
    • https://s3.amazonaws.com/webipejonavuv/the_urbz_sims_in_the_city_gamecube.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_off0000e6fa.bin
c9b130003fb310db0be884b3dbdd05c9a1a4718e4d77ebec8c85d6ce9cdf7e12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 5096 bytes
font_01_sfnt_off0000f856.bin
d50129112b7d3be5b216eff1310e697f36bc54fb67759841789268a2e22e1047		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF856 10512 bytes

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