Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2289f26fb51d4b5…

MALICIOUS

PDF

63.0 KB Created: 2020-12-19 06:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a09ea591fa5f1548d5880defea83284 SHA-1: d0c3a80ca68fc3ef9e9e3003543a154b4bc71230 SHA-256: d2289f26fb51d4b5367c7ad0cb8cf346717794c7e98eb0a199808ce846072b77
156 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. It contains numerous external links, with a primary focus on directing users to `traffnew.ru/strik` and a PDF hosted on `static.s123-cdn-static.com`. The ClamAV detection as `Pdf.Phishing.Trojan` further supports its classification as malicious, likely used as a phishing lure or to distribute further malware.

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://traffnew.ru/strik?utm_term=honey+bee+daycare+canton+nc
    • https://static.s123-cdn-static.com/uploads/4485156/normal_5fca40f158fa1.pdf
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/bulali-wudemulake-donaxixudolaba-xoladusu.pdf
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/gezumuwavizegekis.pdf
    • https://lowijagaji.weebly.com/uploads/1/3/4/3/134394878/76961.pdf
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdf
    • https://tomovomat.weebly.com/uploads/1/3/4/6/134617768/wutevumu-mikatabifi-kosuxun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd07c845ca4f7902678c32/1606223817318/bluetooth_usb_dongle_driver_windows_7.pdf
    • https://uploads.strikinglycdn.com/files/30eb3896-abe4-4b40-9e14-d842f7c3b212/craftsman_ltx_1000_owners_manual.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf51d43f75b16643cbd9f4/1606373844630/36779743196.pdf
    • https://static1.squarespace.com/static/5fc52fda8139af037661153e/t/5fcaa4c1e0f9ce029d0968a4/1607115969758/73938631003.pdf
    • https://static1.squarespace.com/static/5fc0d70dc14dfd36fef128e0/t/5fc1c7234f9837572021d192/1606534948198/84947485855.pdf
    • https://s3.amazonaws.com/mupukesunobaga/89230084692.pdf
    • https://s3.amazonaws.com/tetazino/wowok.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf616d4f98375720d81cc8/1606377838519/cle_elum_roslyn_school_district_jobs.pdf
    • https://uploads.strikinglycdn.com/files/e899944d-59f2-442d-b9f0-6ecb62df81b1/parts_unknown_torrent.pdf
    • https://static1.squarespace.com/static/5fc0879da3bf4b14aba759f2/t/5fc140b6fa04221c714d9b56/1606500534799/dragon_dice_rules.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_off0000bb3a.bin
75a0aafe10d4ef9b229bf7e1824a1a4fb8bca31b9bbf302c52f6fae8bc8cdcfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3A 4928 bytes
font_01_sfnt_off0000cc0e.bin
8838701ec8ff803e0ad150ab337dd7f8634b46ebec61feb830491826bfea9a89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0E 10172 bytes

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