Malicious PDF — malware analysis report

Static analysis result for SHA-256 404e05a1bd05edb0…

MALICIOUS

PDF

59.8 KB Created: 2020-11-21 20:57:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cb8e58021059e68038d2c32854447a7 SHA-1: 183f20dcd524ed11ef408f8f06e5b1fb5fe481ad SHA-256: 404e05a1bd05edb098cc9f487c6ed8dbf9705e9bcd31167b555763d7e2c69aa8
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The embedded URL `https://trafffe.ru/123?utm_term=free+std+testing+chicago+heights` is likely the primary mechanism for delivering the malicious payload or redirecting the user to a phishing site. The document body, though heavily obfuscated, contains text fragments related to 'free std testing' and 'chicago heights', reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/123?utm_term=free+std+testing+chicago+heights
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/c62ab695cfd.pdf
    • https://cdn-cms.f-static.net/uploads/4383327/normal_5f9df60e2c97c.pdf
    • https://cdn-cms.f-static.net/uploads/4405651/normal_5f98125c66eb1.pdf
    • https://tenasusuboziwid.weebly.com/uploads/1/3/4/3/134349012/1262759.pdf
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f99851ae9e6b.pdf
    • https://luwutike.weebly.com/uploads/1/3/4/5/134518400/gorufovomi.pdf
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/e15169ad0.pdf
    • https://cdn-cms.f-static.net/uploads/4421214/normal_5fa9d8097f304.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sonutopexaramuf/95469351600.pdf
    • https://s3.amazonaws.com/fodose/analog_film_paris_mod_apk.pdf
    • https://uploads.strikinglycdn.com/files/94a8ba31-09be-4cba-8ebb-cd1305fda638/friccion_cinetica_formula.pdf
    • https://uploads.strikinglycdn.com/files/6da3a17c-e937-488b-8686-3e806c78dffa/99038769501.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_off0000b0b8.bin
9eabd305ac763021060ddd5ce4e98b86f5571a284fbc054b3b11509a7dff083f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B8 5124 bytes
font_01_sfnt_off0000c21f.bin
3bd2e361cbf0ebeee513fb79772058df30569ccd888b5b7c0806e070f7624705		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC21F 9520 bytes

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