Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee54c5497b3f88d8…

MALICIOUS

PDF

63.0 KB Created: 2020-11-11 15:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d339f5f9478f865a028d348ce3daab6 SHA-1: 1830c569959f11846388d86d01254bc705c2e063 SHA-256: ee54c5497b3f88d8b5e921fe4a410855e0cefb7fd7556914e01745f940e78d27
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF SEO link farm. One of the primary external links points to 'traffking.ru', suggesting a redirection to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/123?utm_term=play+backyard+baseball+2005
    • https://cdn-cms.f-static.net/uploads/4419211/normal_5f9c9d6cc6da2.pdf
    • https://gijakumode.weebly.com/uploads/1/3/4/3/134306186/zatozaxegisuvexukew.pdf
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f89af2b08b36.pdf
    • https://cdn-cms.f-static.net/uploads/4392220/normal_5f8f44a565db4.pdf
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5f917b03d7a95.pdf
    • https://cdn-cms.f-static.net/uploads/4416805/normal_5fa0593349187.pdf
    • https://cdn-cms.f-static.net/uploads/4418401/normal_5fa716c0db099.pdf
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f8b15f2961ee.pdf
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5fa4e6d288888.pdf
    • https://xojowikenokux.weebly.com/uploads/1/3/4/7/134706662/37a1571a34a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bitizopovopaso/gordon_smiley_body_after_crash.pdf
    • https://s3.amazonaws.com/faluzotixupi/36997879892.pdf
    • https://s3.amazonaws.com/serogajugomiji/the_hungry_tide_full_book_download.pdf
    • https://s3.amazonaws.com/sugosubexez/94451952274.pdf
    • https://s3.amazonaws.com/widiku/1476158741.pdf
    • https://s3.amazonaws.com/sugosubexez/insta_downloader_apk.pdf
    • https://s3.amazonaws.com/wemupajese/19999769615.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b873.bin
881f16162ce5ef7427a11d566666a67fd2a05e46b527059a24c0a190692cf7ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xB873 5640 bytes
font_01_sfnt_off0000cbb9.bin
50fe8031421f40b78a03a332950fec27ba76cca227d4bcf41b9e6008e197cccd
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB9 10376 bytes