Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6f2fab7412ddde…

MALICIOUS

PDF

156.0 KB Created: 2020-11-25 09:53:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ded80b3ba3829cfcbcffd6ab5bac44c SHA-1: beab51ce2dfdb11ce29a3956cce7eda716608bbb SHA-256: 4e6f2fab7412ddde4fe202cc172bf13390a08fa3f3a9c687e5d5886ff945c4cf
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a phishing site. The document body, though heavily obfuscated, appears to be a lure related to a school supply list. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://trafffi.ru/strik?utm_term=rochester+elementary+school+supply+list
    • https://cdn-cms.f-static.net/uploads/4402252/normal_5fad81ed5bb92.pdf
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/3e360.pdf
    • https://cdn-cms.f-static.net/uploads/4446774/normal_5fbbe1b76e563.pdf
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/3907448.pdf
    • https://cdn-cms.f-static.net/uploads/4424991/normal_5f9cad5854194.pdf
    • https://kupifibadobibe.weebly.com/uploads/1/3/4/5/134512214/643d2700.pdf
    • https://zozolesib.weebly.com/uploads/1/3/4/6/134631165/4756073.pdf
    • https://rofexelugikovu.weebly.com/uploads/1/3/4/7/134732340/1869884.pdf
    • https://kepupumi.weebly.com/uploads/1/3/4/6/134616340/zonas_dizilujirive.pdf
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/6699016.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fezenur/letter_of_recommendation_for_volunteer_award.pdf
    • https://s3.amazonaws.com/baposivarabuj/76866540519.pdf
    • https://s3.amazonaws.com/janodojivi/59194076751.pdf
    • https://s3.amazonaws.com/donarepemi/18413514569.pdf
    • https://s3.amazonaws.com/zonebon/fezilivapebisivow.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_off00022bb5.bin
8602f6e6c3329cf9eb9db3811dd01a8df1e23b15b7cc3db7bfb67d6d1f2be48c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22BB5 5280 bytes
font_01_sfnt_off00023d8c.bin
c5147f3a775702c24833ee18245fda07253acb92dd43076651f8cbcfb0ef369d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23D8C 11096 bytes

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