Malicious PDF — malware analysis report

Static analysis result for SHA-256 079678b5caf38cec…

MALICIOUS

PDF

81.7 KB Created: 2021-04-06 01:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6fba1099fd005ef7dfdbba7c5adaded2 SHA-1: 19aa323a2c1ca58089740c3c25f78c958e1ee9e5 SHA-256: 079678b5caf38cec8acd6db520f586039eee34095a092817f15c460044b004a8
196 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which appear to be part of an SEO link farm designed to redirect users to phishing content. The primary malicious URL identified is https://vilenefex.ru/123?utm_term=transformer+voltage+ratio+meter, which is presented as a download lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://vilenefex.ru/123?utm_term=transformer+voltage+ratio+meter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448124/normal_5fd136040d233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_60239c4b113eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404987/normal_5fd7e4a254cc5.pdfIn PDF document text
    • https://cdn.sqhk.co/taxotuzu/hChiMBf/bonikopogenimazatu.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/fibjdUQ/defender_110_price_new.pdfIn PDF document text
    • https://jabakatuni.weebly.com/uploads/1/3/1/0/131071057/zozuwaxosidik.pdfIn PDF document text
    • https://bogonifad.weebly.com/uploads/1/3/4/1/134108647/babifebovo.pdfIn PDF document text
    • https://cdn.sqhk.co/zafazegig/hZiaP9j/25046013273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405930/normal_60297ed626af1.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/uibiija/57187493275.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/gigiheT/ludo_club_game_free_download.pdfIn PDF document text
    • https://fupopafesuz.weebly.com/uploads/1/3/4/4/134443157/dekoxog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470409/normal_5fe93a6b102b5.pdfIn PDF document text
    • https://cdn.sqhk.co/zozimevoket/jfaJidS/cake_makers_near_me_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/jc7pFje/pc_shareit_software_download_windows_10.pdfIn PDF document text
    • https://fujelaxu.weebly.com/uploads/1/3/4/7/134704358/delilejanatuli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_6035f158b9e46.pdfIn PDF document text
    • https://cdn.sqhk.co/dawiredi/lNW42uz/fractions_to_decimals_worksheets_grade_7.pdfIn PDF document text
    • https://cdn.sqhk.co/wajewukudino/hcAgehf/8997387165.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/dec2beda-fa0c-4cd6-8a30-8c6a02066556/dotnet_interview_questions_and_answers_for_3_years_experience.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a0e088-d29e-4287-b07f-7dab39335b4a/juzenuzisoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0e62fb3-a468-4351-afb4-ef64f0e07f9f/56136491182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b55c46-235f-4573-aaa2-cbbffa419bb3/27568527294.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCA 5096 bytes
SHA-256: 4865a1c4475ff349fc365f2353897206d4f7805b0aed941c1f583e9684641c8d
font_01_sfnt_off0000fd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD10 10780 bytes
SHA-256: 19d7a3d14477ef315813d4f70efff85465f39b18de6885c5d08f7f11bcb006bd
font_02_sfnt_off00012229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12229 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8