Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b18cc0c5230c57…

MALICIOUS

PDF

74.3 KB Created: 2021-01-02 18:48:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: be2ecf6872285700323a2fe44e6d65c2 SHA-1: e2b74d97b6f24cc4c78135ac4d99bc91cafe3fc2 SHA-256: d7b18cc0c5230c57f95b844f853bb767e614206ad17a6b6a33be4538306b4b07
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a link farm designed to redirect users. The PDF structure and embedded content suggest it is part of a phishing or scam campaign.

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/123?utm_term=front+wheel+drive+manual+transmission+problems PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5feaf0ce86a3b.pdfIn PDF document text
    • https://budaxopam.weebly.com/uploads/1/3/4/7/134711784/vovuvaz.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/6Bhhhgq/gixapopumosinudekukawito.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/xaliduvumafuteza.pdfIn PDF document text
    • https://dolevepi.weebly.com/uploads/1/3/4/5/134587457/satijeximobu.pdfIn PDF document text
    • https://xowetigebunagu.weebly.com/uploads/1/3/1/6/131637365/bawatuvoku.pdfIn PDF document text
    • https://cdn.sqhk.co/wozepefiga/AW0gdih/87921288222.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/wefixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd1ae46-aef2-4388-9d70-7c50cb34083b/upcoming_multiplayer_pc_games_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d67f4d07-1682-46ee-b63f-a9d724cc6f3c/running_man_204.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/7617862320.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE542 5444 bytes
SHA-256: d931b0a57dfab1f29a463c547a443660ffa16cfa4db4ec28d59d11b9a8d0de9c
font_01_sfnt_off0000f7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A6 10844 bytes
SHA-256: f5a638351ee493ff62fdc7e24f15db09d52cfb2fad025e83e0e3298e068ca295

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