Malicious PDF — malware analysis report

Static analysis result for SHA-256 6600e926c5cd5b91…

MALICIOUS

PDF

76.2 KB Created: 2020-12-28 07:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 41306f25cf7696ebe9989bb1cc5a4f8f SHA-1: d6d6ab50441dfce625914926ba898ccbd4cb147a SHA-256: 6600e926c5cd5b91a8dad3c9fcb4b3c305f1e322472fb180ff08b1e673f84a1e
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious content, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The primary malicious URL identified is 'https://traffmen.ru/strik?utm_term=2+player+local+co+op+ps4+games', which is likely used to redirect users to further malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/strik?utm_term=2+player+local+co+op+ps4+games In PDF document text
    • https://puzuzabijil.weebly.com/uploads/1/3/2/8/132814257/e0a10f480e6.pdfIn PDF document text
    • https://diborukokaw.weebly.com/uploads/1/3/0/8/130814192/zapapese_wigozajaju_wotanibe.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/juliziwojatige/70450250342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5331a189-0e27-4ba6-aa12-0553cbe5ae9d/91240007528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a86455-f841-42e5-84ab-2e3faf7b3876/sapujezepaxaxofavoguride.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b96e7603-d061-4d99-b4d5-27c4d3883210/nokuvulunijanamigowutaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/023261a0-c3c0-4eb9-8da4-26c10d99df6e/tech_edge_golf_clubs_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31fb72df-ae1a-4ae3-993b-b79013b52eea/64957383746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72646419-4be2-412a-918a-12b52dfe67a4/city_of_dallas_permits_building.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa21f94-040c-41bc-93fb-63a309b6ecfa/katujetutop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16be7786-7261-49f1-bc61-181eab889fe2/vupobunipewojalifokamupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/347d379d-4c80-4a62-9f64-768f0d1019f1/37092349472.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_off0000ee1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1D 5480 bytes
SHA-256: bb802eb2acb156f8c9b29609ecc8ccdbebf485d48fbf97d88200c389855ca1db
font_01_sfnt_off000100be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BE 10296 bytes
SHA-256: f75437e73c6b20211b503b0b0fd3ad5ca16238d502447edac8ffca8ca8370b5f

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