Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d81c0c8b4d9b6ce…

MALICIOUS

PDF

74.6 KB Created: 2021-01-11 02:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 621c5bdfd2cd8c60946c77290d2fd8c8 SHA-1: d05a951d1de90c00eedd57fd9918f4ba7fe05249 SHA-256: 9d81c0c8b4d9b6ce8e94026ff55ed5819f14a7c7cace91e6d13aa83b6c72c431
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. The embedded URL 'https://traffine.ru/123?utm_term=names+starting+with+s+boy' is the primary indicator of this malicious redirection. While no scripts were explicitly extracted, the nature of the PDF and the redirector link suggest an attempt to lure the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=names+starting+with+s+boy In PDF document text
    • https://static.s123-cdn-static.com/uploads/4454684/normal_5ffa44b0420de.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/bQrjjmq/peel_master_satisfying_peeling_soap_cutting_asmr.pdfIn PDF document text
    • https://cdn.sqhk.co/mojesoje/lTggzQa/23975150303.pdfIn PDF document text
    • https://site-1192422.mozfiles.com/files/1192422/75786020916.pdfIn PDF document text
    • https://site-1178139.mozfiles.com/files/1178139/dark_sword_trilogy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5fa7bcba6a962.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469640/normal_5ff23881ab01a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/bise_faisalabad_date_sheet_1st_year_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/downy_infusions_amber_blossom_90_dryer_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/what_is_apb_stand_for.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/android_phone_remove_google_assistant.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/lithium_in_pregnancy_guidelines_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/gubed.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAD 5156 bytes
SHA-256: 0d9ef6cbb7bb133a075319f7cadd362d25101165769b30827cd6017405fc1f8b
font_01_sfnt_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 10288 bytes
SHA-256: 3babe9bcd389c67706a67932d150fa6f13ddc7cdc102626c65789337ed857772
font_02_sfnt_off00010f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F40 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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