Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcb8df79862fd22…

MALICIOUS

PDF

76.1 KB Created: 2021-01-01 14:33:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79f9271a82cddf6103dce1db4fed4b06 SHA-1: 169f29a72e702063cc814473061ead2ec6d0fae4 SHA-256: 8dcb8df79862fd2241e63584f6328bfe1ca223bfa747c3694e0cdec28b42ff38
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The document body, though heavily obfuscated, appears to reference game mods, aligning with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/strik?utm_term=game+gods+of+olympus+mod+apk
    • https://cdn.sqhk.co/vixivizal/ghjjbq6/yellow_wallpaper_analysis_essay.pdf
    • https://static.s123-cdn-static.com/uploads/4428052/normal_5fe42030988a8.pdf
    • https://cdn-cms.f-static.net/uploads/4490264/normal_5fab347098da9.pdf
    • https://cdn.sqhk.co/nokikifabaf/CfifjbH/69201904963.pdf
    • https://static.s123-cdn-static.com/uploads/4366406/normal_5fca7b10b2368.pdf
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5f8b0d7c4200f.pdf
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f883f3d71349.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fosagoba/cnm_accuplacer_test_practice_study_guide.pdf
    • https://s3.amazonaws.com/jolufozo/sinis.pdf
    • https://s3.amazonaws.com/nowokil/42695326358.pdf
    • https://s3.amazonaws.com/lejivugeleguwod/breakfast_menu_templates_free.pdf
    • https://uploads.strikinglycdn.com/files/939c448a-561d-455f-9760-46d055010fcc/demogozemalazugaduduf.pdf
    • https://s3.amazonaws.com/teximikamukubo/xafosakeridoxoxabebobaxa.pdf
    • https://uploads.strikinglycdn.com/files/2d778605-b7b1-4663-ab1a-0acecce5b493/11819788286.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de8f.bin
cf572e763e79ebcdd3c1b46b42b3ad2659434ea2c404f3571598c901902c50bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8F 5112 bytes
font_01_sfnt_off0000f01a.bin
13ff7f7fcfd44cf54703bab0725b43b79890ce2a80808af13806d495ab66bb23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF01A 10852 bytes
font_02_sfnt_off00011547.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11547 4324 bytes

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