Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5447153099bdcd…

MALICIOUS

PDF

70.4 KB Created: 2020-11-23 07:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83abba868717de87b02ae96a63df42b5 SHA-1: 1bd04a7f4d40f79d78e12ebb268fd5ee43a62c54 SHA-256: 9c5447153099bdcdd7ed4f95f2778a2a5fbac3dd27a6557784e45801448925d4
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and the presence of numerous external PDF links. The document body, though heavily obfuscated, contains text related to 'fnaf game free download ios', suggesting a lure to trick users into downloading malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a distribution point for further payloads.

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://traffine.ru/123?utm_term=fnaf+game+free+download+ios
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5f88bebc3786a.pdf
    • https://cdn-cms.f-static.net/uploads/4417321/normal_5fa6650d4d8c8.pdf
    • https://bipinutafo.weebly.com/uploads/1/3/4/3/134358532/2cadca89b19.pdf
    • https://gebulofafilo.weebly.com/uploads/1/3/4/7/134717894/pamonokiwij.pdf
    • https://puvovajol.weebly.com/uploads/1/3/4/0/134040332/vasuzobuf.pdf
    • https://cdn-cms.f-static.net/uploads/4459324/normal_5fbb2f2eb0467.pdf
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5f8ddf039fc84.pdf
    • https://pisotojike.weebly.com/uploads/1/3/4/5/134594110/denuguxinil.pdf
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5f9560b0b102b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8a92bc28-f071-4b81-9bdd-f71c9e2ea512/67713680801.pdf
    • https://uploads.strikinglycdn.com/files/2df2578b-02f0-4775-8197-60bcbea78126/25091508155.pdf
    • https://uploads.strikinglycdn.com/files/a44b5d4d-a7ef-4a4a-bd73-9d83bdd339c4/foroxu.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_off0000d4db.bin
4e416c49f9bc23d43aeaf757e788115cff10fa5c2e756087e5984b38a7097bce
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DB 5272 bytes
font_01_sfnt_off0000e6d1.bin
d4e9da5abb8fd651b4b4bc5c50bb45cb2bc6432d51b165964bb9ab2106b52e69
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D1 10628 bytes