Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee0c505776cd205…

MALICIOUS

PDF

72.9 KB Created: 2020-12-18 11:15:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad4d81990946cbe5b6254533553325c1 SHA-1: 901769cb276f16e60cba17317ffa1c93ba5c78d6 SHA-256: 8ee0c505776cd2052497ffd9dda4e6c50caa20410f2bb42f7f9dc27f6a5576b6
156 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to 'traffking.ru', which is flagged as suspicious and likely malicious. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://traffking.ru/strik?utm_term=life+shield+insurance
    • https://fuxiwajusefu.weebly.com/uploads/1/3/4/6/134617271/4300785.pdf
    • https://gokaveruziniva.weebly.com/uploads/1/3/4/5/134580144/2634045.pdf
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/dininonevowun_lijituvoz_xiwosi_gekogilemume.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pirofopafu/philips_avent_manual_breast_pump_online.pdf
    • https://uploads.strikinglycdn.com/files/5ef3baf5-8f62-4cda-9c0b-c1a0531d2b56/minecraft_shapeshifter_mod_1.13.pdf
    • https://s3.amazonaws.com/jadudusujuje/xunefarareseminuvaruzeki.pdf
    • https://s3.amazonaws.com/didowugorokirug/a_k_letter_wallpaper.pdf
    • https://uploads.strikinglycdn.com/files/2f517438-bd9f-4a71-8665-af577e235bf9/gujagogigisomavodaselu.pdf
    • https://static1.squarespace.com/static/5fc6d3bb48c1673e5598f85d/t/5fd71844dca221526059e921/1607931973473/jekefu.pdf
    • https://static1.squarespace.com/static/5fc64a44a3bf4b14abcdd78e/t/5fd21835fec2791e310e683a/1607604285557/97136331010.pdf
    • https://uploads.strikinglycdn.com/files/05fe69c5-3e7b-4967-9a3a-621878ad2ae6/trucos_sims_4_fama.pdf
    • https://static1.squarespace.com/static/5fc5756a6609fd0ee7b04842/t/5fc8f2a9d36c960de91f4e09/1607004841898/resuretegoti.pdf
    • https://s3.amazonaws.com/dorulusof/occupational_safety_and_health_training_guidelines.pdf
    • https://s3.amazonaws.com/gazitif/2500_lb_badland_winch_manual.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce22.bin
31e2819f79add43a126e8e0d65e05f1867b54e6f92eba0719216566a214014b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE22 5052 bytes
font_01_sfnt_off0000df49.bin
308a2d10ed809ab88f7670ceabd080d5cd640de8c4003ba24bf305eb7b16b8bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF49 10148 bytes
font_02_sfnt_off00010220.bin
014fdb7076ebfc326e48e50914f0077be73d9a972b327c9fef30e9d59f054234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10220 16080 bytes

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