Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf107453d6937f3…

MALICIOUS

PDF

66.2 KB Created: 2021-01-25 06:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3fce9397fed3c89b7ccd4cdffebdede2 SHA-1: ce58a2c5115deba43dc906e3ca59ed3b1c7ee7fc SHA-256: ebf107453d6937f3c3167373478f657a40b95383a30554030e352ffab3c9a08a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'traffking.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of embedded URLs and the redirector link strongly suggest a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=things+that+start+with+e+around+the+house In PDF document text
    • http://wbigs.space/into_mirror_mod_apk_1._0._11jrku0.pdfIn PDF document text
    • http://stal-kemerovo.ru/rush_limbaugh_radio_stations_californiagrz4k.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/Rtgd5Qs/katibozafesipalevumel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425908/normal_5fe3bbbf86cd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450158/normal_5ffbcf7ddd561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452588/normal_5fd5f5f902e1f.pdfIn PDF document text
    • http://stikc.xyz/mogodaduxojodedoxokiwueu9g4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/us_history_sectionalism_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/rs3_completionist_cape_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/tulubifejufi.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/bandicut_full_version_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55F 5096 bytes
SHA-256: 6030c6268c5dddf656ad33d67d272e1084f333dc1c70064fbec336db832a08a7
font_01_sfnt_off0000d6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C1 11180 bytes
SHA-256: 6b7da83a8d665c72f7d115718a128ab6904cb8d36241b03afb1d534b21109157

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