Malicious PDF — malware analysis report

Static analysis result for SHA-256 495132dacc13569f…

MALICIOUS

PDF

77.1 KB Created: 2020-12-31 22:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0257abcbda2777308b7e9556c24ade8 SHA-1: 12f6feee4270ea2d58c1581608a74c6d9031d54c SHA-256: 495132dacc13569f675314cecfd692c0aa5c22d7f6054144905aead5a18e8741
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous external URLs, with at least two pointing to disposable hosting and one using a UTM parameter suggesting tracking for a specific search term ('fitbit versa 2 review youtube'). This indicates a phishing or scam attempt designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/strik?utm_term=fitbit+versa+2+review+youtube
    • https://busaluvugisegiw.weebly.com/uploads/1/3/4/3/134368440/zobiderisosovobasag.pdf
    • https://gekuxufetog.weebly.com/uploads/1/3/1/3/131384115/4834915.pdf
    • https://dirotigakavomak.weebly.com/uploads/1/3/4/2/134235834/a0b607388074.pdf
    • https://cdn.sqhk.co/ladetozuxi/GjbhheS/datuveganufok.pdf
    • https://cdn.sqhk.co/jumifokujuje/jihjejh/no_man_s_sky_xbox_game_pass_mods.pdf
    • https://kedaregedowe.weebly.com/uploads/1/3/5/3/135321867/xajubokaturu.pdf
    • https://cdn.sqhk.co/keserina/fhcggjh/color_by_number_happy_paint.pdf
    • https://tunikasas.weebly.com/uploads/1/3/1/4/131438809/3041374.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a6c315cf-67ee-4058-b1b6-ef9b76fba613/83893959048.pdf
    • https://uploads.strikinglycdn.com/files/76c9f8db-71f6-4c06-bfe6-7f9cac80e4d2/72138169980.pdf
    • https://s3.amazonaws.com/jemazejodep/ap_physics_1_textbook.pdf
    • https://uploads.strikinglycdn.com/files/0a8d496e-9fab-4b49-b7cd-f2d251eedf00/25591424202.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_off0000f0ea.bin
e9be3fc9a70b199719d13a8071c126cf1aad94b86b8dde91404c03c0c83c25b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EA 5128 bytes
font_01_sfnt_off00010287.bin
762b992e4bd6d42f144554a5b01d92826e579c0e77a2ed4537302254e079753d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10287 10828 bytes