Malicious PDF — malware analysis report

Static analysis result for SHA-256 c662d2860c597224…

MALICIOUS

PDF

87.3 KB Created: 2021-03-16 20:56:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0173699d94518fbafe5bba29d17a8c84 SHA-1: debaac91660f941fa11b8295cba95be73b3807ae SHA-256: c662d2860c5972249249d12f0afed0836728eece40c8f9a9a7bae07ddb9be633
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'student id' and 'wkhtmltopdf', aligning with the heuristic findings of a link farm designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/wix?keyword=my+wake+tech+student+id PDF link annotation
    • http://instapriz24.online/frm_part_1_practice_questionsmg2jc.pdfIn PDF document text
    • http://show-visitor.xyz/oxford_dictionary_english_to_gujarati_free_download44x3k.pdfIn PDF document text
    • https://posesisex.weebly.com/uploads/1/3/5/3/135332701/ropafedaj.pdfIn PDF document text
    • https://xafituku.weebly.com/uploads/1/3/4/8/134863640/aa9680257ea.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/5z5ypf.pdfIn PDF document text
    • http://batmbatm.ru/matlab_arduino_programming7n786.pdfIn PDF document text
    • http://fruitslope.online/61908613791izaq7.pdfIn PDF document text
    • https://ranalugepileli.weebly.com/uploads/1/3/4/7/134735155/539260.pdfIn PDF document text
    • http://leadtop.co/gideperuji8nn3w.pdfIn PDF document text
    • http://nikaold.site/nepinenagidefepukea7zy.pdfIn PDF document text
    • http://presalle.xyz/surah_mulk_english_translationsc9n7.pdfIn PDF document text
    • https://xedowekogo.weebly.com/uploads/1/3/4/6/134609622/runozonupovinenaworo.pdfIn PDF document text
    • https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/5e85daa3567.pdfIn PDF document text
    • http://mists.space/best_nature_for_single_strike_urshifuk53ng.pdfIn PDF document text
    • http://m-ryanaf.site/siginalisisolodobiv0omsh.pdfIn PDF document text
    • http://babysampler.com/peter_max_net_worthelpcf.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/pidunagi.pdfIn PDF document text
    • https://linepapimufuto.weebly.com/uploads/1/3/1/6/131637640/0f66cf7dba.pdfIn PDF document text
    • http://cuzinfo.ru/define_the_term_impulse_of_a_forcelsm2s.pdfIn PDF document text
    • http://roman-holidays.shop/systems_engineering_mastersfda2q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_d6ce16de0c18423289a7472be4ab2265.pdf?index=trueIn PDF document text
    • https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_34f0b90c264f43e2b4ad986e2848c242.pdf?index=trueIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_22c4d36aeea34a30a8e08ee26756af5b.pdf?index=trueIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_fe4bb275159745ab96c6e0b807d8a23f.pdf?index=trueIn PDF document text
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_c6a56223b53445c1ba49c629f62fdef6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6A 5164 bytes
SHA-256: 6c18cda6065434e8df99a9e04d1e91d55b792fb2ee71c3b22c1abbd701927881
font_01_sfnt_off0001111d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111D 11576 bytes
SHA-256: 162fd8bd785b46bd11a5c8133a6f94256bfeaf2b1673d4daa52c5e603a976eab
font_02_sfnt_off00013866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13866 16232 bytes
SHA-256: 90063111fd84fc9d3bbe0e91a25c30074b178549c4c86487e0bfae44fa44017a

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