Malicious PDF — malware analysis report

Static analysis result for SHA-256 f917893470dba8f5…

MALICIOUS

PDF

125.3 KB Created: 2020-11-16 17:15:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9263ce3c2964f90f5d919166479fce5d SHA-1: da94d7817526fbccce7f88a857619d4185fd7f52 SHA-256: f917893470dba8f5d759a3cd69f777a1a0d62566b931bffcbbb2b95d9a67a53c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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/123?utm_term=fugoo+xl+speaker+manual PDF link annotation
    • https://gulesome.weebly.com/uploads/1/3/4/4/134496781/kutunup-tezolexunifiwim.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/90dddf.pdfIn PDF document text
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/rokozutadogupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f8c61fc1c44a.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/43a349bf4de6ea5.pdfIn PDF document text
    • https://sixupotivene.weebly.com/uploads/1/3/4/3/134305687/5ea3afce8.pdfIn PDF document text
    • https://dabagurujor.weebly.com/uploads/1/3/4/3/134350609/38f3aa77b2626b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8bf01c42-e8b1-4345-9d03-da7be614f4d1/madorerapav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0efe34e0-d02e-4924-9840-24b01dcb308f/mujimumogevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d6bbc2-6064-428e-ba58-e5c8d2baf4ec/jezuviz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d30f5c-6911-42bd-a408-f93991d7972e/lodogavuwisimomul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b32aa54-9b29-4fbd-9a06-376cb9645104/madizuzozoto.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/tank_trouble_3_unblocked_66_at_school.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/mafefuvuveserebe.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001980e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1980E 2880 bytes
SHA-256: aff11289bf87f92bc53c0e2abc335208e29b6db8a954e82fd0a5595ffa95d344
font_01_sfnt_off0001a24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A24C 4980 bytes
SHA-256: df98d5336410e9f1014d1e3e57e3ceca2202e8930b1cce4f617e7290e0327e01
font_02_sfnt_off0001b32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B32B 11436 bytes
SHA-256: 5bc60b5d37c75d56a7664c2763396bc3e1b893289b12cb5bd571b85490304e73
font_03_sfnt_off0001da28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA28 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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