Malicious PDF — malware analysis report

Static analysis result for SHA-256 71df8aa22a16b80d…

MALICIOUS

PDF

84.8 KB Created: 2020-12-28 07:59:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e888f5f79628689b827b7fd8f5f86aa SHA-1: d51661e31fc743d978917fabbb4733afa8509f26 SHA-256: 71df8aa22a16b80d2c90c051ccb9b3098578b483bc7717aa833fba42726c6904
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm heuristic. One of the primary external links points to 'traffking.ru', suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=sec+swimming+results+2020
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/nukaxoxiwajujuzov.pdf
    • https://cdn.sqhk.co/wunokebewoz/jijifhc/police_chase_games_apk_download.pdf
    • https://cdn-cms.f-static.net/uploads/4379500/normal_5fd6c7bab83bc.pdf
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/2796375.pdf
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f93f23565371.pdf
    • https://cdn.sqhk.co/sisadenev/iighhhg/nwsl_soccer_league_teams.pdf
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5fa9ace83f6b1.pdf
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f873c1bef7da.pdf
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5f8dad1425ff4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mamukawaxatali/bokuk.pdf
    • https://uploads.strikinglycdn.com/files/ec192b8f-63a7-46be-a190-5177ba075c16/67447529386.pdf
    • https://s3.amazonaws.com/lebaxa/45864315513.pdf
    • https://uploads.strikinglycdn.com/files/c87bda3e-2418-4b03-8e21-68ecf80491e7/15333604871.pdf
    • https://s3.amazonaws.com/wizuluworafid/mystic_messenger_v_endings_guide.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac6.bin
47252585791460af2874fd2bf606796fd8c579f60ad3df2e4fdf9d018950e341		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC6 5376 bytes
font_01_sfnt_off0000fd0f.bin
51fdb87e165cf230d07523ec378e7965393c37f1e764cc9f4a3bffc10c788174		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0F 2508 bytes
font_02_sfnt_off00010809.bin
0432027a395a489b6ca62638c049ef9f1898a6fc0b80fb8681d38d801abbabc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10809 11184 bytes
font_03_sfnt_off00012e72.bin
334a632046566dba1e13aa2ad28522ffc4701ff005b1d667d8ded0e84145bcf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E72 16304 bytes

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