Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f53db0642f33ff6…

MALICIOUS

PDF

82.7 KB Created: 2021-03-24 22:01:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dd5f5e425121b7f69244bed2f9babc60 SHA-1: db153b45e9074cc2cc887371752cd4e28aaf5b0c SHA-256: 8f53db0642f33ff6528f7a27d0373826d0282ba465189c068c8b4bd51e9c1255
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many of which point to a link farm designed to redirect users to malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. The primary malicious URL identified is 'https://lozipotod.ru/123?utm_term=economically+weaker+section+form+in+gujarat', which is used in a deceptive lure related to economic forms. While no scripts were explicitly extracted, the PDF structure and link farm behavior strongly suggest an attempt to deliver a secondary payload, likely a phishing document or malware, via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/123?utm_term=economically+weaker+section+form+in+gujarat PDF link annotation
    • https://s3.amazonaws.com/zidenigad/boveluvije.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/guvodumipawozoxawenap.pdfIn PDF document text
    • http://tugokutuli.scienceontheweb.net/8865625702.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/37056155360.pdfIn PDF document text
    • https://dupukaradox.weebly.com/uploads/1/3/6/0/136015529/bawuf.pdfIn PDF document text
    • https://pixasowurixes.weebly.com/uploads/1/3/4/9/134904492/vewimef-fokufogomoj-vituvofifopodu.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/fejepufefapisirelolasi.pdfIn PDF document text
    • https://cdn.sqhk.co/vuluzazogur/teif8gc/marvel_future_fight_wiki_epic_quest.pdfIn PDF document text
    • https://suzulazupe.weebly.com/uploads/1/3/3/9/133997697/ce5a1.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/basic_tactics_for_listening_tapescript.pdfIn PDF document text
    • https://cdn.sqhk.co/sezabaxo/wjaiRja/red_herring_prospectus.pdfIn PDF document text
    • https://powufekati.weebly.com/uploads/1/3/4/0/134012492/sawasavigopip_jabozonodinoj_dupowekuposo_xudaguz.pdfIn PDF document text
    • http://linodogeb.scienceontheweb.net/preface_to_lyrical_ballads_1802_william_wordsworth_summary.pdfIn PDF document text
    • http://kazexajisodibu.medianewsonline.com/tableau_activation_key.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/f094040a-3086-4fa0-8fac-7f54481b48c1/kubota_spare_parts_catalogue.pdfIn PDF document text
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_32104ec723fc4e949a3974588a0348c8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02189f82-48c1-4ac1-a1a0-e6a104ab0bc0/how_to_read_an_ekg_for_beginners.pdfIn PDF document text
    • https://34184745-b1ec-4725-b105-60c94cc90871.filesusr.com/ugd/63369f_572872a417bd4d048f9b8c3cfc5e33c0.pdf?index=trueIn PDF document text
    • https://178fd8f3-986e-459b-a431-83c1f58eadb8.filesusr.com/ugd/7a8e82_ae457929af404c66990b96147902762b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/89a80bfa-dea9-46c6-87fe-795d6c9b3841/thule_bike_rack_lock_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ec2fa1-487e-49db-813e-6822a2916d79/30911171003.pdfIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_988cc6d392a440959faf70c3f8fb86a1.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE329 3080 bytes
SHA-256: 0fcef192c95d6fd4d5333de3e5f0a04c8525a73f6e29f4febd37223f58d6e746
font_01_sfnt_off0000ee32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE32 5492 bytes
SHA-256: 3b3b6b64fe55b4d2feb14d329380525fb86d2ecb134403b9a5f973ff1a706303
font_02_sfnt_off000100ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100ED 10596 bytes
SHA-256: 5f5b7037f6d1300fd5c1ae043ef06bceff379d0be80b15b7e294401112783e9c
font_03_sfnt_off00012580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12580 16172 bytes
SHA-256: 461a1578f80084b2f2ca998a6e716936969cc9b33b2976d66eaaa57f6abee57a

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