Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d24ceb9d53fb18d…

MALICIOUS

PDF

76.9 KB Created: 2020-12-21 03:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e721b32ceb9c2e82a45fb69ff2a4b8d2 SHA-1: 74ab41e46bb80ea50583a93bd18ad4ad60621893 SHA-256: 8d24ceb9d53fb18dad3cd617d94735a3ccae28a9d315efe5c4b6693cb5c50db9
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, trafffe.ru, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site, consistent with spearphishing.

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://trafffe.ru/123?utm_term=dauphin+county+recycling
    • https://cdn-cms.f-static.net/uploads/4373985/normal_5f9a5d4d1dcc4.pdf
    • https://cdn-cms.f-static.net/uploads/4452199/normal_5fc122f276712.pdf
    • https://cdn-cms.f-static.net/uploads/4386824/normal_5fd8f6f582f8c.pdf
    • https://cdn-cms.f-static.net/uploads/4391907/normal_5fdbc706c376c.pdf
    • https://cdn-cms.f-static.net/uploads/4401525/normal_5fa1ea65771bb.pdf
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5fba375ddda5a.pdf
    • https://cdn-cms.f-static.net/uploads/4416919/normal_5fadf85abda2a.pdf
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5fd76e071303b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc5add9f9866f3fd2f487b8/t/5fd0b09ccb6bfe602c56212e/1607512243122/shopping_mall_tycoon_idle_supermarket_game.pdf
    • https://static1.squarespace.com/static/5fc592a72e34347c706420e1/t/5fcb9995190ee82df8dfc6f3/1607178647024/olympic_2020_logo_png.pdf
    • https://static1.squarespace.com/static/5fc6715adf132613bbe3892d/t/5fcc8d2d0ab5d62febec492c/1607241006033/kexediliso.pdf
    • https://s3.amazonaws.com/takeju/nanubabimejowolononefux.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_off0000e83d.bin
d43f4772a54fe433191e5d466e36ebae0100c432d0b7680428b6fd6606084bf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE83D 5120 bytes
font_01_sfnt_off0000f9b6.bin
e1baef2744b498a9b82ee420d183a58d44cc459cafd5f9d5a9e82ef19f1af7df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B6 14628 bytes

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