Malicious PDF — malware analysis report

Static analysis result for SHA-256 8080bb9e5b9b97a5…

MALICIOUS

PDF

149.1 KB Created: 2021-01-08 09:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1490eb3ad538241c0102468f785d0d1 SHA-1: 79efe8f7efd55dba25cd9d3fd6adf7afc92fb9fe SHA-256: 8080bb9e5b9b97a5df70fe8f08855c45e8ed8c61f19cd993246f0023b2440dfa
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external URIs pointing to disposable domains, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect the user to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/aws?utm_term=krishna+bhagwan+ka+bhakti+gana+video
    • https://cdn.sqhk.co/lapefuxolu/SdgcNig/english_horror_stories_download.pdf
    • https://vejazisiji.weebly.com/uploads/1/3/0/9/130969480/3d13feb6c.pdf
    • https://vefigemeg.weebly.com/uploads/1/3/4/3/134368147/rididitibo.pdf
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/65a51dcda9.pdf
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/vatopudomi.pdf
    • https://cdn-cms.f-static.net/uploads/4499300/normal_5fb34c133a7b3.pdf
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wilajolobowefixinate.pdf
    • https://zosagejezigim.weebly.com/uploads/1/3/4/7/134709887/4e9c17a6a4d318e.pdf
    • https://devumevone.weebly.com/uploads/1/3/4/5/134589636/802a20b92.pdf
    • https://kipakewetug.weebly.com/uploads/1/3/4/6/134606983/sinikatof.pdf
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/moramugetef.pdf
    • https://fojaxekixuwid.weebly.com/uploads/1/3/4/7/134743661/vufufiw-pewupiw.pdf
    • https://cdn.sqhk.co/ruwonumatag/cijWnUs/laguwinuragalirofis.pdf
    • https://zevebijupaxize.weebly.com/uploads/1/3/4/7/134754497/kobemorino.pdf
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/1183acf104ebf1.pdf
    • https://ladukupubavar.weebly.com/uploads/1/3/0/7/130776836/zotegasibez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off00020c10.bin
ef5b49d8f2f0b83b748dc8264f268ff8d94438793bfd86e8432e44ce2dffaddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20C10 5380 bytes
font_01_sfnt_off00021e69.bin
8ec48619dcb718608ced32569d5da92e5bd58b3b8944f37dabfa171da53700e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21E69 12876 bytes

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