Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a977e19c8330a05…

MALICIOUS

PDF

68.3 KB Created: 2020-12-21 23:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7d003f783c7bf1347b3183621527885d SHA-1: 4ca108a726eb96300dee075eadd77ffc6c283641 SHA-256: 4a977e19c8330a054bb1d2b7ce477bbdb5094b42ce98ae4aa73454352ff4c647
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 pointing to external resources, which is indicative of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at 'traffmen.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

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/123?utm_term=ynw+melly+we+all+shine+zip+album In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_5f9a40a029d7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f9e18fa09c89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5fa5c4b4f0af0.pdfIn PDF document text
    • https://gupebuxoguwev.weebly.com/uploads/1/3/4/3/134381402/kevinefudenus_rekuparum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403540/normal_5fe006a9837d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_5fa07126a1510.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489240/normal_5fb602847835c.pdfIn PDF document text
    • https://sazefowefojewen.weebly.com/uploads/1/3/4/8/134893887/rezujoxot-ganipo-komuregetop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388285/normal_5f8e8a7112318.pdfIn PDF document text
    • https://wapatawavef.weebly.com/uploads/1/3/4/7/134775304/dobazijavewiniwubos.pdfIn PDF document text
    • https://fekarerexenafot.weebly.com/uploads/1/3/4/6/134698220/1841887.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3320d291-213f-4768-b4c6-12361a60a1dc/xedarodudetudus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b73b63-27a0-430c-84db-2d6fa63c1e76/24373828486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ca51c61-7d4b-4abb-9320-122b124e8630/avast_license_key_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c57f06fe-b0a7-4386-8ec9-5bcc4e923afc/nijaborabaletemudik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e49688e8-add2-4516-a626-3d0b40a5d13e/84819442845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6333c3c7-d975-4329-8c98-5f7790581881/49820315032.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_off0000bf28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF28 3592 bytes
SHA-256: 1468282430438ccd81c5bc205b5e092876e0217d5e145909299ade655293545e
font_01_sfnt_off0000cbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF6 5308 bytes
SHA-256: 69ae7ade53b2f0eaad8cfe6d44d5b77458a99d36aaa2671939b0aff28d2437da
font_02_sfnt_off0000ddfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFB 11468 bytes
SHA-256: 6a3181b52841c4789a1126dd163979ab4a57b8a2c098d2a4b2401c83f6b03b5a

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