Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9a502ce2453d44…

MALICIOUS

PDF

73.5 KB Created: 2021-02-22 04:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 4e7430140fa5912aaaf113c7a46a738f SHA-1: 62d51e494ad51214cef67c92f0c0f2bf4e589fef SHA-256: 7e9a502ce2453d44d85e668c227deaa53ac1a522d4ded486a3864dd86dfd4f49
196 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which point to SEO-optimized PDF files, suggesting a link farm or phishing lure. The presence of a redirector URL and a high ML classifier score further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution campaign.

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.
  • 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://bologen.ru/strik?utm_term=logitech+z+5300+replacement+speaker PDF link annotation
    • https://metesanej.weebly.com/uploads/1/3/1/8/131858044/4982319.pdfIn PDF document text
    • https://zomafada.weebly.com/uploads/1/3/4/7/134772300/sefurodidifiku.pdfIn PDF document text
    • http://zumigiguba.22web.org/heart_failure_esc_guidelines_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/gobenebovi/hibjdja/indpay_app_download_for_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/tizudukokeni/0gNKiex/girakeke.pdfIn PDF document text
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/46ad35052878157.pdfIn PDF document text
    • http://laura-egorova.ru/development_administration_definitione4uye.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vanatul/xukabikosigaxufuwitoxomu.pdfIn PDF document text
    • http://kofufinaniba.rf.gd/65697687236.pdfIn PDF document text
    • http://sepijizalababom.epizy.com/facebook_tagged_photos.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/flaine_snow_report_ski_club.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/mubesupu.pdfIn PDF document text
    • http://lilufafuf.epizy.com/horton_grange_primary_school_bradford_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/budapest_map_free.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_off0000dee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE8 5832 bytes
SHA-256: 9495c55a3a055a0e8830744604c3b2c086b7efaf41ac3e44d698b809fb04ae1a
font_01_sfnt_off0000f2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AA 11180 bytes
SHA-256: c9a97975d86ce86a8c0bd60687455eaabda1b51dbb5e429a008b6ed254fbda0b

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