Malicious PDF — malware analysis report

Static analysis result for SHA-256 367c8b9536206e66…

MALICIOUS

PDF

84.2 KB Created: 2021-01-04 20:11:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: efe710d7307ce27230d1b876379c63a0 SHA-1: 4cf9e31dcc20a26f947bd9480d709bb4107eb7ca SHA-256: 367c8b9536206e6622b17610f42245f19c2f5d0c68a8c71a049226f66ddfd394
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating it is part of a link farm and SEO redirector scheme, designed to phish users. The embedded URL and linked PDF farm suggest a malicious intent to redirect users to potentially harmful websites. ClamAV and ML classifiers also confirm its malicious nature.

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://trafffi.ru/aws?utm_term=australian+embassy+visa+information PDF link annotation
    • https://tolixolosunep.weebly.com/uploads/1/3/4/4/134403343/rufofufeva_gojiforine_tibij_tisujogabuba.pdfIn PDF document text
    • https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/xidetudiguba.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/lolitu_fapepaxoxog.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/f9889557-38b6-4b36-9643-e1526d02e0cd/25820561889.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/icse_biology_class_10_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/weather_report_emporia_ks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/070942c5-8c40-495b-b3b2-2d18fe560290/10380924097.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/algebra_1_chapter_5_resource_book_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/podujirofawediduburet.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/full_form_of_computer_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/quality_control_of_pharmaceutical_aerosols.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_off00010b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2A 5204 bytes
SHA-256: 56fce79c4291e6496a816ee1e4b8bf430792038847783149c86c7f9f061a02e9
font_01_sfnt_off00011cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD8 11512 bytes
SHA-256: 78657701b595a6e2ac97c656737863bb5e6cf8d4247f57dc19802ff8f8999763

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