Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea93c20ff5cd4f6…

MALICIOUS

PDF

69.7 KB Created: 2021-02-27 07:12:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 895573a11727fbdc9165b00988ad8953 SHA-1: 57a8761c4776b72c1d2db91b413cda55ab61bcb7 SHA-256: dea93c20ff5cd4f6d6bc5b5241e11cfc6e1bb4593026969ca92c7fb9603778a0
126 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/aws?utm_term=1992+suzuki+quadrunner+250+brakes PDF link annotation
    • http://mokemowowove.mygamesonline.org/duzusodusaxikafesavon.pdfIn PDF document text
    • https://kafolegilu.weebly.com/uploads/1/3/2/3/132303068/7307054.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/dowuloxatogera.pdfIn PDF document text
    • https://gabusuve.weebly.com/uploads/1/3/5/2/135297202/vimulili.pdfIn PDF document text
    • https://bunupujitoj.weebly.com/uploads/1/3/4/0/134017728/galidukenowibugude.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/57914920286.pdfIn PDF document text
    • https://cdn.sqhk.co/fifusaji/igic0jc/black_beauty_trailer_1971.pdfIn PDF document text
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/07bf0.pdfIn PDF document text
    • http://jowopejev.22web.org/mepisajunifopimixovir.pdfIn PDF document text
    • https://menafove.weebly.com/uploads/1/3/1/4/131438456/273c226a70.pdfIn PDF document text
    • https://lolemifazez.weebly.com/uploads/1/3/1/8/131871650/bogoge-zanoxixenaj.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/xorume.pdfIn PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/zuwuzikukupepexuw.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/66896086077.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guziruxasa.epizy.com/xamarexexapimajabinu.pdfIn PDF document text
    • http://sajififavaw.epizy.com/kaxiwupetekagabofawajorir.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_off0000cf71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF71 5680 bytes
SHA-256: ebbbd0fbe6557d2d7db13261296813bbe3c032e5d484cec00821a652c45c40e5
font_01_sfnt_off0000e2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DE 10984 bytes
SHA-256: 043a54c76333c3d4244d406735a197b4ee08c79e6a32ce1f8473401925eedc0b

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