Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88edde1a61ecafe…

MALICIOUS

PDF

67.9 KB Created: 2021-01-12 06:20:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a01ef28efea7434d4649d44f21bc4741 SHA-1: d812dfbf2aac32cab7677808a4d6dd44e6fe85bc SHA-256: e88edde1a61ecafe3d411df05e83383d037d582f4fe7ad4e7fe2a857f4b286ce
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of an external URI heuristic further supports the malicious intent of directing the user to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://traffnew.ru/123?utm_term=ark+bosses+the+island+solo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446045/normal_5fa3e7c526de0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389107/normal_5fcb34e21c82b.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/rzdoihi/mod_for_minecraft_morph.pdfIn PDF document text
    • https://site-1173450.mozfiles.com/files/1173450/tikoneju.pdfIn PDF document text
    • https://site-1214349.mozfiles.com/files/1214349/kill_herobrine_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/hdjcsbh/smash_the_glass.pdfIn PDF document text
    • https://site-1176940.mozfiles.com/files/1176940/3580435243.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/53805350363.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/jeduwubaj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD6 5108 bytes
SHA-256: 0395ad4530b31bda8cb75dc46f9d8b36081f3444a329bb64ff96d682d1169fd5
font_01_sfnt_off0000df2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2E 10724 bytes
SHA-256: 891e556dc619fae2491f3a9c3ee2429672f38d8c2892beb400b31b1017deb93f

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