Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b7d8c2ca1f1eeca…

MALICIOUS

PDF

81.6 KB Created: 2021-05-24 11:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3903d699fe1d298b1e6a752a4e2f737 SHA-1: 2e41ec2930a87739b06e95788f8814375f961a95 SHA-256: 3b7d8c2ca1f1eeca4f66174967f7674fc47c5535d21aa8c82a5ee26e2b17d049
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing malicious content. The 'DOC BODY' content, though heavily obfuscated, suggests a lure related to a game mod download. The presence of external URIs and a PDF link farm heuristic indicates the file is designed to redirect users to potentially harmful websites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/strik?utm_term=jurassic+world+mod+apk+unlimited+everything+1.50.15
    • https://gutamigev.weebly.com/uploads/1/3/1/1/131163772/gutimelafol.pdf
    • https://cdn-cms.f-static.net/uploads/4496360/normal_604303a08d8ae.pdf
    • https://static.s123-cdn-static.com/uploads/4462678/normal_5ffe74d591ccd.pdf
    • https://cdn-cms.f-static.net/uploads/4451225/normal_602633485b51e.pdf
    • https://cdn-cms.f-static.net/uploads/4369516/normal_6009ed378321c.pdf
    • https://cdn-cms.f-static.net/uploads/4375696/normal_600c9c4285572.pdf
    • https://static.s123-cdn-static.com/uploads/4378628/normal_60075b16be5d7.pdf
    • https://cdn-cms.f-static.net/uploads/4407331/normal_606187e09d647.pdf
    • https://kenafowipadile.weebly.com/uploads/1/3/1/4/131437871/bebosudezap.pdf
    • https://nitogufufuwal.weebly.com/uploads/1/3/3/9/133997090/dopuw.pdf
    • https://static.s123-cdn-static.com/uploads/4384026/normal_60018104027d3.pdf
    • https://cdn-cms.f-static.net/uploads/4488569/normal_60160a829080b.pdf
    • https://wamabiror.weebly.com/uploads/1/3/1/1/131163705/jatidifovivozen_mepeke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/77bd8653-2845-47bd-8e32-e021e85ad1ff/kipelowunoto.pdf
    • https://uploads.strikinglycdn.com/files/be07fa57-3152-48f1-977c-017eb0777692/96639200082.pdf
    • https://uploads.strikinglycdn.com/files/18b51e46-1d1f-4634-a697-38fc39ad8faf/the_betrayed_ending_among_us.pdf
    • https://uploads.strikinglycdn.com/files/1e7b9f00-d748-43da-ba12-9e62231b4e2e/niwulonunapemujitofime.pdf
    • https://uploads.strikinglycdn.com/files/5494e80e-61e4-4127-84b9-550b424b9ea6/hp_laserjet_cp1215_printer_driver_download.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_off0000edf1.bin
a354e5e3b71e32709d11dae285f88a0be1c1eb606ef497910d4f6bd3e806ebea
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF1 6024 bytes
font_01_sfnt_off00010267.bin
bd5f81abcffa054a67fb7e8cceedf9241f7c7ee91c40f7950835fc8c4809c67c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10267 11004 bytes
font_02_sfnt_off0001283f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1283F 4324 bytes