Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b94ae7d3c583bf…

MALICIOUS

PDF

72.5 KB Created: 2021-03-01 11:29:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03b00585e4899449aeb2fc57382432d7 SHA-1: 55c546d0c526aea84fcc976c04fdc0d421389d96 SHA-256: f6b94ae7d3c583bf0da9600aa2182c84ea0f9beac3b25029496beec9fbff6d25
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI strongly suggests a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/wix?keyword=find+someone+who
    • https://cdn.sqhk.co/wavagowew/jfPgfGO/59029453511.pdf
    • https://cdn.sqhk.co/simikitivo/Khdxhht/pigeon_attacking_baby_pigeon.pdf
    • https://cdn.sqhk.co/dabozijide/cvBjdey/94995032047.pdf
    • https://cdn.sqhk.co/jizapamilizo/nOyrhj7/hat_trick_origin.pdf
    • https://cdn.sqhk.co/wofazexej/h2hd5ii/ww2_eastern_front_medal_for_sale.pdf
    • https://cdn.sqhk.co/tebefaravuz/ejcl3xk/silicon_valley_season_6_cast_gabe.pdf
    • https://cdn.sqhk.co/gofelaxes/hdjgnjb/baribuvesizonez.pdf
    • https://cdn.sqhk.co/gufemazibafi/tgihjG0/mermaid_wallpaper_for_cell_phones.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nuselufuzo/photoshop_free_trial_for_mac.pdf
    • https://s3.amazonaws.com/zukogi/jezosobipofuxotazasumo.pdf
    • http://virilos.epizy.com/belajar_bahasa_jepang_premium_apk.pdf
    • https://s3.amazonaws.com/wexukufedepim/futowi.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_off0000e20c.bin
db6bca80c5d1d1068e23719fe6ed3f2f91dd37597f224f1bd4b20f2a057c2a66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE20C 4772 bytes
font_01_sfnt_off0000f239.bin
6a36168b8e2c47dc7204e99c2abb215baaefca1cad3ab7efe9f8f17ee0d07a5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF239 10336 bytes

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