Malicious PDF — malware analysis report

Static analysis result for SHA-256 af3a4bf69b96fd5c…

MALICIOUS

PDF

63.9 KB Created: 2020-12-26 01:08:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cab77bd7f6ff98fba8e5fa9f9838a5ad SHA-1: d19c5c550f457c27fe810a5c9d7adb2eb70e33c6 SHA-256: af3a4bf69b96fd5c726d694318c5da55d78ae050f77a45a5d7847099b5de6852
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware delivery. The document body, though heavily obfuscated, appears to contain text related to weather, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://traffset.ru/123?utm_term=charlotte+rochester+ny+weather
    • https://cdn.sqhk.co/fewukise/TFLvuja/planbook._com_promotional_code.pdf
    • https://cdn.sqhk.co/simunenij/ekijfjd/colors_of_the_wind_vanessa_williams_wiki.pdf
    • https://cdn-cms.f-static.net/uploads/4405642/normal_5fd287ead101a.pdf
    • https://cdn.sqhk.co/tegimatararo/hhhcyih/kavakapibinilub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ronatiduzoxij/5974068207.pdf
    • https://s3.amazonaws.com/jifedefujodu/tafanopeze.pdf
    • https://s3.amazonaws.com/fosagoba/77330317271.pdf
    • https://s3.amazonaws.com/davawina/divergent_aptitude_test_buzzfeed.pdf
    • https://s3.amazonaws.com/tonisefoteka/calculus_lecture_notes.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_off0000bed1.bin
339d856e9e92fbc3e0366c8bbd4c8f48932f6fce8c79d20408a97e1639a3e5de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBED1 4984 bytes
font_01_sfnt_off0000cfce.bin
f03b8d17f98ba793c0a562496dbf085682c626f8a82aed7d8894d41ef817347f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCE 10372 bytes

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