Malicious PDF — malware analysis report

Static analysis result for SHA-256 df92e65da5cebd81…

MALICIOUS

PDF

73.9 KB Created: 2021-01-03 11:45:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64a740219d5ef4fc6f14337776f19e77 SHA-1: b4a9de552713e1ddbcae4fb2a017cc1aef9bbbda SHA-256: df92e65da5cebd81c73030d83598aa9d30e297e1050af21d91464ed70ae19f09
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. 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, contains text that appears to be a lure related to a form, aligning with a phishing attack.

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://traffset.ru/aws?utm_term=d+m+full+form+in+english
    • https://static.s123-cdn-static.com/uploads/4489713/normal_5fec2601c374b.pdf
    • https://cdn-cms.f-static.net/uploads/4379961/normal_5fdbbcd30548f.pdf
    • https://cdn-cms.f-static.net/uploads/4447450/normal_5fd2534ebf9b3.pdf
    • https://static.s123-cdn-static.com/uploads/4470537/normal_5feb8ba29b0ed.pdf
    • https://cdn.sqhk.co/rewakevutel/haggrge/random_character_name_generator_wow.pdf
    • https://cdn-cms.f-static.net/uploads/4388422/normal_5fb804c6a2910.pdf
    • https://cdn-cms.f-static.net/uploads/4497110/normal_5fbbe7a7510ac.pdf
    • https://cdn.sqhk.co/xulawajikigi/egdjfTB/billboard_music_awards_2020_country_nominees.pdf
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5fa16dd8094e6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/00952968-0138-4d6f-a849-bb735166beb8/turtle_shell_rot_treatment.pdf
    • https://uploads.strikinglycdn.com/files/654f1ddf-0dae-4ba4-9c78-46be2590cc0c/nomulegofana.pdf
    • https://uploads.strikinglycdn.com/files/50cec4e1-b7a8-4154-932e-db7231df8a71/52651619430.pdf
    • https://uploads.strikinglycdn.com/files/b64ebc18-41b8-4114-a091-bd9fcce12e39/25733113103.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_off0000e144.bin
13776510a19c222f686125405a89122859a1e8cbe02a868e0ee01823612e0798		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 4968 bytes
font_01_sfnt_off0000f20a.bin
3991465deadac72abad6ca9e1bd957ae2e8bc508039db0efee76bbbd116c6548		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF20A 11712 bytes

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