Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c0594f363397e22…

MALICIOUS

PDF

75.0 KB Created: 2021-03-01 10:24:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 76c0694ca2b0d74a12a0851a96f03df9 SHA-1: 37df228e5a5d5b3295b88c1e9e2546e1f5bc3a69 SHA-256: 3c0594f363397e22c5fbd91fc891aa6cd42f245c8536ac6ddc2c4ba8348c1688
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to SEO-optimized redirectors, indicating a link farm or phishing lure. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=el+caballo+de+troya+pdf+gratis PDF link annotation
    • http://jushq.pro/why_is_my_coffee_grinder_not_workingf3cqu.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/88718142548.pdfIn PDF document text
    • https://vopasigujar.weebly.com/uploads/1/3/0/8/130813381/9e0cee7d106273.pdfIn PDF document text
    • http://copyright-securityx.com/android_screenshot_app_apkaekpj.pdfIn PDF document text
    • http://0fruits.space/barren_island_volcano_information6g3pk.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/jjhghia/can_you_save_the_sculptor_sekiro.pdfIn PDF document text
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/8151808.pdfIn PDF document text
    • https://pevivifigevesiw.weebly.com/uploads/1/3/5/3/135315965/2656780.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/juzinaramip/gesila.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/24431041611.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/11149070957.pdfIn PDF document text
    • http://ratobewiwigu.atwebpages.com/how_much_does_verizon_jetpack_cost_a_month.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/foolish_heart_steve_perry.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/94078753711.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_off0000e4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CB 5520 bytes
SHA-256: 85dc75d81d909d709700f81fa5d3930500140052198c977ad58d233cf4cdb062
font_01_sfnt_off0000f7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A6 11704 bytes
SHA-256: 97bcd13b283016566297b7f1e3ff1184d957eb2cb4b5e6e6fe6123376f176015

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