Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a030f828dbb56b…

MALICIOUS

PDF

71.1 KB Created: 2021-01-17 02:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7f9c59f18d5eec5b2bb9ff9e585dffcc SHA-1: 69f70323c2cbe0c25ad322c592d0ecdd80c951e3 SHA-256: b6a030f828dbb56ba5de9a27eaddf458fae54fa88ef5c6ade36cfc9ef05f6e47
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This URL is likely used to lure victims to a malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector indicates an attempt to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/wb?keyword=electricity%20meter%20reading%20units%20in%20pakistan In PDF document text
    • https://static.s123-cdn-static.com/uploads/4479707/normal_5ffcc73484a75.pdfIn PDF document text
    • https://site-1178226.mozfiles.com/files/1178226/16731534448.pdfIn PDF document text
    • https://site-1168194.mozfiles.com/files/1168194/tiled_map_editor_collision_layer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393626/normal_5f9cfea02a307.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481173/normal_5fc799d651cb5.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/bucjcij/chocolate_chip_cupcake_recipe_simple.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372682/normal_5ff2671d1a471.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/tupofelasujewas/lucius_fox_baseball_scouting_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/goxiw.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/android_17_mir_sweater.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_off0000d732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD732 5516 bytes
SHA-256: 2e3c427265ca57995647fc94e92c6ccf7e502080a1752e4653919f4431571f68
font_01_sfnt_off0000e9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EF 11080 bytes
SHA-256: 54b94174e7f74f45a3d05633c8043c42da93856ac31b68e5306e343173271397

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