Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe6c0f470d34ad9…

MALICIOUS

PDF

81.1 KB Created: 2021-03-14 03:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7d7aa4e2ec93883aabf92facaba01459 SHA-1: 9954d549de2f0e2cef47e459d4535b646d2c1f60 SHA-256: fbe6c0f470d34ad9c2b652b0c366eb75651c2a520f6aed2572045265a126c5f0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://soxebez.ru/strik?utm_term=on+combat+dave+grossman+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381740/normal_5fcdb746c8bc5.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/hhPnheg/zejipoxovi.pdfIn PDF document text
    • http://blancer.xyz/aareon_ag_annual_reportk6938.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/ahficaC/memenuwof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425506/normal_5ffe1a4e5d1b3.pdfIn PDF document text
    • https://rubitolagaju.weebly.com/uploads/1/3/5/3/135330326/8735805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_5fd2f576779b2.pdfIn PDF document text
    • http://storeeu.info/gamofizuv002zo.pdfIn PDF document text
    • http://olymptrade.buzz/punomubumixahlr.pdfIn PDF document text
    • https://widadosu.weebly.com/uploads/1/3/4/7/134715299/lomoxikabexebu_riwama_gapok.pdfIn PDF document text
    • https://timonuwek.weebly.com/uploads/1/3/4/3/134383578/199223.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/je36v0z/kezawonubunifobat.pdfIn PDF document text
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/462df6a122420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471704/normal_6049a256b63e0.pdfIn PDF document text
    • http://latencfsrt.space/logigajujufatudesuzosozeonasl.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/Q7idMia/lisuxixubur.pdfIn PDF document text
    • http://streichpack.online/effective_workplace_communication_marsha_ludden0fdm4.pdfIn PDF document text
    • https://rikusinifo.weebly.com/uploads/1/3/4/0/134017093/fukelizegujur-kebimusufowag.pdfIn PDF document text
    • https://cdn.sqhk.co/mofinopedas/hTjdjge/jukuvonesizizizatimexive.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABE 5668 bytes
SHA-256: c98d01c5c54930aca61448e9e5a0938f325ea45f370d3e665114292154223cd6
font_01_sfnt_off00010dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEE 12124 bytes
SHA-256: 2d13163169408b7c0359ddf2132a3ea639daf0eb6ae91f3616b0b00afde23c32

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