Malicious PDF — malware analysis report

Static analysis result for SHA-256 87d675997e2ba400…

MALICIOUS

PDF

66.9 KB Created: 2021-02-19 20:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c98f677beda69b79cd101148a44ea8fb SHA-1: 299db66f9dee0602a4d8d89cb4f68890b3d52853 SHA-256: 87d675997e2ba400328fabfc2d24b0f702992cfffe41cb330f9565445c73fd92
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm with 30 external links, many hosted on disposable domains, designed to redirect users through various URLs. The document body, though heavily obfuscated, suggests a lure related to a 'daily bible study guide pdf'. The presence of external links indicates an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

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://bologen.ru/strik?utm_term=daily+bible+study+guide+pdf PDF link annotation
    • https://nujelojebalu.weebly.com/uploads/1/3/4/6/134690198/lotapepomajura_garegusozi.pdfIn PDF document text
    • http://strapslap.online/99299840647dbacn.pdfIn PDF document text
    • http://bigmagazin.xyz/pure_athletic_sports_performancel1nbu.pdfIn PDF document text
    • http://stavki-na-sport.site/medal_of_valor_3_ww2_apk5lt4z.pdfIn PDF document text
    • https://xevefoworux.weebly.com/uploads/1/3/1/3/131380592/daraxofimizik.pdfIn PDF document text
    • https://daxusumupazi.weebly.com/uploads/1/3/4/7/134702932/wogopurojagu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369772/normal_5ff775a6bd2cd.pdfIn PDF document text
    • https://cdn.sqhk.co/zezegawutogu/fhgigji/draw_wheels_game_app.pdfIn PDF document text
    • http://easycreditscore.info/sogovtok4r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425255/normal_6007ef8c94820.pdfIn PDF document text
    • https://sevafigetof.weebly.com/uploads/1/3/4/9/134902911/1674101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_6015bc7db2061.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/chaaV1p/58340186267.pdfIn PDF document text
    • https://resawipodejevi.weebly.com/uploads/1/3/0/8/130814711/zedina-femapufovofi-zoxasojifip.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/hfmIjdL/hoplite_sword_length.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_off0000c798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC798 5352 bytes
SHA-256: fff83340849fdf4c11b99f465faad1416d38247defc5c5415f03922cd50987f6
font_01_sfnt_off0000d9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F1 11308 bytes
SHA-256: f52b7e8ea3fdb13efa1e69597fd2c6854f89fee06bdd168e4be9a99158942072

Open this report in the interactive analyzer, or submit your own file for analysis.