Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6bf1345b5d515be…

MALICIOUS

PDF

73.5 KB Created: 2020-11-25 05:35:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ebb9d7f37ca9da54087e91eb93aa24b SHA-1: 1ef53e6ce4830a99abb1b23a2549ec1a320622fd SHA-256: d6bf1345b5d515be79b32a0cc4dbcfa334397389bfb3df5f84c2f457674796cc
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a URL that appears to be a lure for a phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of an external URL is a primary indicator of a malicious download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://trafficel.ru/strik?utm_term=school+bus+images+gallery
    • https://cdn-cms.f-static.net/uploads/4404103/normal_5f975e68c08fe.pdf
    • https://cdn-cms.f-static.net/uploads/4490366/normal_5fadf98f39515.pdf
    • https://cdn-cms.f-static.net/uploads/4417321/normal_5f984226ddb10.pdf
    • https://cdn-cms.f-static.net/uploads/4376087/normal_5f8a63da31f78.pdf
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f90b8abd5d97.pdf
    • https://cdn-cms.f-static.net/uploads/4403404/normal_5f98d2c37328a.pdf
    • https://cdn-cms.f-static.net/uploads/4379974/normal_5f8f88c015dab.pdf
    • https://cdn-cms.f-static.net/uploads/4382627/normal_5f9d1df92aaaf.pdf
    • https://cdn-cms.f-static.net/uploads/4476418/normal_5fbb04245d7da.pdf
    • https://cdn-cms.f-static.net/uploads/4393631/normal_5fbba6bf7ce86.pdf
    • https://cdn-cms.f-static.net/uploads/4468838/normal_5fa8cc67eb9f3.pdf
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8a14bc3e8b2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bulozor/jafetefofev.pdf
    • https://s3.amazonaws.com/zaxawetawupo/33733732417.pdf
    • https://s3.amazonaws.com/gopuze/13647875683.pdf
    • https://s3.amazonaws.com/votuweroxigezog/29369505818.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_off0000e1b6.bin
7ba7ca74e81d983fe96b384e2c2131c4ffb4fb6631f06c918ddbebc7038750a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B6 5560 bytes
font_01_sfnt_off0000f473.bin
2fba1e905b475485cb75d41e59699a8c28cc0ef972be65adfb7959e409032e78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 10828 bytes

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