Malicious PDF — malware analysis report

Static analysis result for SHA-256 782f2f58d17f6c72…

MALICIOUS

PDF

68.5 KB Created: 2021-02-21 06:30:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2098693e86f7670389a7b1e68124c779 SHA-1: 4dc744bff5a59f927793b9aa8639cdf03e12dd14 SHA-256: 782f2f58d17f6c72ae3470145f412d1d3248123f65d2da36dcacb6bfcd4642ac
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by multiple heuristics and an ML classifier as malicious. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The 'Browser extension / update installation lure' heuristic indicates the document's content is designed to trick users into installing potentially harmful software. The presence of numerous unknown-reputation URLs suggests a broad phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/wix?keyword=xbmc%252Fkodi+wrapper+apk PDF link annotation
    • https://vopobibipudo.weebly.com/uploads/1/3/4/6/134620476/161469.pdfIn PDF document text
    • http://mignonette.space/restas_llevando_de_dos_cifras5043h.pdfIn PDF document text
    • https://fagutefoxod.weebly.com/uploads/1/3/4/2/134235025/1413e86798.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/223785.pdfIn PDF document text
    • https://zelelifejoba.weebly.com/uploads/1/3/4/3/134321633/bimiwenoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408866/normal_601dd83e100be.pdfIn PDF document text
    • https://tolibopajam.weebly.com/uploads/1/3/4/4/134487495/dowezigomir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_601eacf71b36f.pdfIn PDF document text
    • https://famemizi.weebly.com/uploads/1/3/6/0/136006686/8c85912dff5952d.pdfIn PDF document text
    • http://snegny.com/42443366217qg0aq.pdfIn PDF document text
    • http://skameyki.club/fimawedofezibezijenigsuzv4.pdfIn PDF document text
    • http://uablog.site/minecraft_seed_map_viewerve1t4.pdfIn PDF document text
    • https://posilopawirina.weebly.com/uploads/1/3/4/3/134353572/xuzavupubuw.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_off0000d0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B6 5320 bytes
SHA-256: d05bd0511441ed40a2c985c9b3756a43d22657eea744a2881363fede4ffc8194
font_01_sfnt_off0000e2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C5 10240 bytes
SHA-256: 9a779864e7c101bbb21767456e8e7aaf3ffaaeb91dd2190781b42da1c970463f

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