Malicious PDF — malware analysis report

Static analysis result for SHA-256 683816bdc00b3a9f…

MALICIOUS

PDF

83.3 KB Created: 2021-03-30 12:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bfec3f9887329d309474eefb1b3ceb82 SHA-1: d9cd2e9a12b749c0275f28fee96496fae401af85 SHA-256: 683816bdc00b3a9f434e6c4335d06a3371f441a0adcb0481b6a429dae15c421c
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded URLs, with one specifically referencing a 'bursary application form' to deceive the user. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm designed to redirect users to potentially harmful sites. No scripts were extracted, but the document's structure and content point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jacksth.ru/award?keyword=safcol+bursary+2020+application+form+pdf PDF link annotation
    • http://rusewigojubilon.mygamesonline.org/tafesutikesalomutagorodab.pdfIn PDF document text
    • https://moxalabukeziro.weebly.com/uploads/1/3/4/7/134772199/6d21106622534b1.pdfIn PDF document text
    • http://carinsusa.com/star_wars_jedi_academy_mods_single_playerce3si.pdfIn PDF document text
    • http://sadipize.scienceontheweb.net/94429503047.pdfIn PDF document text
    • https://cdn.sqhk.co/besimiwi/PjJjipX/paxogogowugerasubufur.pdfIn PDF document text
    • http://storeplus.pro/43075991290u6p8i.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/9m5ckEs/22201659265.pdfIn PDF document text
    • https://wudusalulolatus.weebly.com/uploads/1/3/1/6/131606476/patewur.pdfIn PDF document text
    • https://duvigefotazepex.weebly.com/uploads/1/3/0/7/130775674/8194075.pdfIn PDF document text
    • https://gijagexerifaru.weebly.com/uploads/1/3/5/3/135322880/4264456.pdfIn PDF document text
    • http://xalowazejadiv.getenjoyment.net/caida_libre_delos_cuerpos_fisica.pdfIn PDF document text
    • http://socialwave.me/chemistry_lab_formal_report_examplexb1r4.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/kafises/how_do_i_fix_low_water_pressure_in_my_faucet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a6372db-549c-4d4a-9076-cdc639679042/rekafitapidafesawive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8edb282-6109-4272-bc76-ace34c4eae28/5081832344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38513f11-0656-43b0-87b0-e94f01cfa6b6/shimano_ultegra_di2_front_derailleur_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/fogugokigodiz.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/astounding_science_fiction.pdfIn PDF document text
    • http://feferabi.atwebpages.com/33394182188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ec4f1c2-f2cf-408d-a29f-1daf9da40abb/total_gym_xls.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001037c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037C 5920 bytes
SHA-256: a9bf404542f932f9c6d9a438482947b8cd5e06233bd9a5f9ecee0076261b21a4
font_01_sfnt_off0001178e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178E 11488 bytes
SHA-256: 1f57315b6b93305196bd8afce3c24915c6a9063dd3c06caa360960530937f8f1

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