Malicious PDF — malware analysis report

Static analysis result for SHA-256 2004e226bc4e28ee…

MALICIOUS

PDF

71.9 KB Created: 2020-12-23 14:56:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cbdfcc1cc55666fb57766942c3e5fe59 SHA-1: 79942ff69f55afe4376947378d1998b709429c7f SHA-256: 2004e226bc4e28ee92f4d621a8b71e35df9f8786879329e642d9a67db643ab93
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous external links, many of which are hosted on disposable domains, to lure users into downloading content, likely malware, under the guise of a game. The presence of external URIs and a link farm suggests an attempt to distribute malicious files or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=ludo+classic+game+free+download+for+pc PDF link annotation
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/lirifasas.pdfIn PDF document text
    • https://fukagopesuzidad.weebly.com/uploads/1/3/1/3/131381553/13608e.pdfIn PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/gowufudin_duwixuvipiworug.pdfIn PDF document text
    • https://tewifevorifoja.weebly.com/uploads/1/3/4/3/134387655/2138435.pdfIn PDF document text
    • https://lakerevuko.weebly.com/uploads/1/3/4/6/134654656/7aa560849f.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/40539d9295f58.pdfIn PDF document text
    • https://guzaxogovi.weebly.com/uploads/1/3/4/6/134651677/5d930b0e.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/288e223a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426547/normal_5fdc25486105c.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/7278024.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3659453a-a0cd-404f-8ec4-24d17c456e71/jobugadugipajaburusapomos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43635e94-3c56-48b6-a813-0c496e874c0c/unidad_4_leccion_2_reteaching_and_practice_page_15_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ec1ac9-a988-4e22-8d27-7e94dc430c60/denides.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/ark_single_player_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/alfa_laval_lkh_pump.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/kali_linux_android_sdk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7deb1150-be18-44f3-857c-d0938770b8d4/25685040636.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AC 5508 bytes
SHA-256: 824d2d0cc3a9fc95a1f04388b8c62a0b582221fd8a4c309d37627a9427f59f51
font_01_sfnt_off0000ec6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 11096 bytes
SHA-256: a81dd4e50f4863fb1bbb6d1c428ba968d60aa05ae8d88c7e451ec91afd657bbb

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