Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d7696dc29103fd…

MALICIOUS

PDF

70.5 KB Created: 2020-11-13 16:27:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 62e15fbd9cd72359141f5e13f9598415 SHA-1: df560114caedb2d44007b9c759daed6edb158361 SHA-256: 34d7696dc29103fd397f868c4762ca5fc151348e2b4c2877b7eadca1f1d3f498
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://cctraff.ru/123?utm_term=get+rid+of+stinker+chapter+6 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_5f981171706c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_5f9d3ccc21d21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476282/normal_5fa4e1f79e151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f8dd41171385.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/jepinebawo/the_official_act_prep_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/xisebexexomizoragafeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfbcccd5-9f61-44c7-979c-c0d2f27980ee/12038697462.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/hurricane_felix_haiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1bf7fa4-a3ae-481c-8b88-46c33fac7e63/coined_by_shakespeare_crossword_puzzle_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cde4bba5-b89d-47fb-865b-4dbd444cbdca/vadawixubi.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_off0000cb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB66 5248 bytes
SHA-256: 5619a0687b69dbccee6614a50beaff002fe69cfa31d4d82540ff53d9a92209e2
font_01_sfnt_off0000dd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3C 10088 bytes
SHA-256: 166781f429ccc7ad1162f3b7c7f6c6cb3edac818c9e76024f7cb756c57875c4c
font_02_sfnt_off0000ffaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333