Malicious PDF — malware analysis report

Static analysis result for SHA-256 840c2c801ac3ada5…

MALICIOUS

PDF

64.7 KB Created: 2020-11-16 18:56:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6620a223bae5f2433e031e2e503feca SHA-1: 7c86abd71daa6c2d5596e8c86430c03aaeb06211 SHA-256: 840c2c801ac3ada5619256d06331bb4261a46cadb6f7a36a6616c56a014b22fc
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to downloading 'guardianes de la galaxia 2', likely a lure to entice users to click on the malicious links.

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://traffine.ru/123?utm_term=descargar+guardianes+de+la+galaxia+2
    • https://cdn-cms.f-static.net/uploads/4388814/normal_5f8e588193c21.pdf
    • https://cdn-cms.f-static.net/uploads/4378628/normal_5f930a82376a0.pdf
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/wasonomibirobe.pdf
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/dogire-zolutovokusigi-zogutired.pdf
    • https://zikenanevo.weebly.com/uploads/1/3/4/5/134589255/tufemepugigikak-bijejovuwonu.pdf
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/damenakowitopavuseb.pdf
    • https://nekamijej.weebly.com/uploads/1/3/4/6/134633096/gelebepumajapi-dajil-takonedujovi.pdf
    • https://cdn-cms.f-static.net/uploads/4471488/normal_5fad6734e472f.pdf
    • https://xufuluzigi.weebly.com/uploads/1/3/4/2/134266078/2758411.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2b0f919f-20dd-46b7-b89c-d225c7db56b6/27018036948.pdf
    • https://s3.amazonaws.com/bodajaku/pufagexutulerefalowus.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_off0000bc05.bin
775b5e5c5cf006bfdb1d0662d954f8ee1821bd9cb0306e508322120302a58721
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC05 5304 bytes
font_01_sfnt_off0000ce28.bin
71ef155cfbdd442eeaa5e3135e0e8dbe66cd0e99257b99bbdad1e30e3ce429a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE28 11696 bytes