Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c885caa3752b99…

MALICIOUS

PDF

70.9 KB Created: 2020-12-20 10:28:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4c28eb9cfad1e574d6933c773ca66855 SHA-1: 70ffe5d06402dabd1d08a5bc845a6598d3d3efff SHA-256: 01c885caa3752b99ff931cd4e22895ba407fd492c63066fcae50f433e37e344f
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The ML classifier also assigned a high probability of maliciousness. The embedded links, such as 'https://cctraff.ru/strik?utm_term=things+fall+apart+short+answer+questions', likely lead to phishing or malware distribution sites, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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.
  • 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/strik?utm_term=things+fall+apart+short+answer+questions In PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/budisavememikator.pdfIn PDF document text
    • https://biwizifu.weebly.com/uploads/1/3/4/5/134505058/6326961.pdfIn PDF document text
    • https://sewobefavewekog.weebly.com/uploads/1/3/4/3/134367647/likabinufuze-lerasejewawif-muvixirose.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf520efa04221c71171631/1606373902856/15804813806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b900487-e824-43fd-a99f-97fe3c8d854d/tokageruxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4211f78d-9ae2-4be6-ac57-07824f4318d3/semawiriv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c6f329b-6cb3-404a-9bb2-bae6e526ba89/free_real_estate_offering_memorandum_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97238cea-7cc8-4691-b6f1-95e67ccb27c5/historia_2_tercer_grado_secundaria_larousse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f67250a-363d-468b-85a1-f9c2f4418c47/tuneup_utilities_portable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd57f783-2f29-4805-b900-7ad19332e612/vepanoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8145da8-aacb-446c-bcbd-94f05f9e960d/49239033431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ffe936b-15fa-4903-9e67-384a70ba5906/what_sound_does_a_hedgehog_make.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_off0000d7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E2 5332 bytes
SHA-256: 67847777ab7dafeba063202a3b8ddf83a19192972cea48bfb8b39f24565c80e5
font_01_sfnt_off0000ea17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA17 10664 bytes
SHA-256: c40c82152141b0200c719e9bbcb25573cbb1d30584e5f76d03e491319b9718c5

Open this report in the interactive analyzer, or submit your own file for analysis.