Malicious PDF — malware analysis report

Static analysis result for SHA-256 99392e9ed4ce479d…

MALICIOUS

PDF

70.1 KB Created: 2020-11-12 19:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 767e0a51961fafe5bb257fda074b268c SHA-1: bd5cd6d085642b28d70cb3c21477ab62040be7af SHA-256: 99392e9ed4ce479d992c2db9cefe44fecddc7eede4c02ce74e3212cfc803bb1e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with one specifically pointing to 'traffking.ru'. The presence of a link farm suggests an attempt to manipulate search engine rankings or to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • 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://traffking.ru/123?utm_term=5+syllable+words+speech+therapy
    • https://rurizurerenudiw.weebly.com/uploads/1/3/4/6/134649160/ec9fa072e964b7.pdf
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/beparinunij.pdf
    • https://besavijoxamidu.weebly.com/uploads/1/3/4/0/134096513/4739155.pdf
    • https://wifusewaxoxuxi.weebly.com/uploads/1/3/4/4/134497844/futiwitemanag-wukudigo-depema.pdf
    • https://fejisamuzek.weebly.com/uploads/1/3/4/6/134636520/1634128.pdf
    • https://voziguwotameba.weebly.com/uploads/1/3/4/3/134345279/ffc40040a9e2.pdf
    • https://xosesobo.weebly.com/uploads/1/3/4/6/134697532/favopirirarazal_vifiwe_lepizowa_xisuxeme.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/9f677cbd-bf56-4ae4-b19f-d624600bd05e/what_is_the_purpose_of_industrial_robots.pdf
    • https://s3.amazonaws.com/wovigebi/kufebaneg.pdf
    • https://uploads.strikinglycdn.com/files/6ff4c655-1e8b-43c5-9341-d00b4d8f6400/jegonamataledipi.pdf
    • https://uploads.strikinglycdn.com/files/40f90c50-fe8d-4ff0-ab96-ce24d486afd4/revugozegobe.pdf
    • https://s3.amazonaws.com/gulapore/fimukoja.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_off0000c5bf.bin
aa0dd2b013eff6cbaa573bca07d5b0b3bfd8942baf0e7fb790407cc890c218a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BF 5156 bytes
font_01_sfnt_off0000d76b.bin
2a582ec9cace71aabbb028b99ed29343e0a2a70c5bd0153e17f8c2c4af97129d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD76B 11216 bytes
font_02_sfnt_off0000fdd0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD0 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.