Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffa8f642f73e6eb…

MALICIOUS

PDF

78.5 KB Created: 2021-03-11 06:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5a38cae47bfaa47699d1de5efefdf306 SHA-1: 1d3a3bcb3a7b6f417ea93ce8d5e74581face1f85 SHA-256: 0ffa8f642f73e6eb8204636d3bdb8bc0f6c4cba5d7e657d633596d59246c9c1e
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 numerous embedded URLs, many of which point to disposable domains and link farms, indicating a phishing or malicious redirection attempt. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vilenefex.ru/award?keyword=headway+elementary+workbook+4th+edition+pdf PDF link annotation
    • http://weareanonymous.org/nation_simulator_2_full_apk_revdlxznko.pdfIn PDF document text
    • https://sinekagu.weebly.com/uploads/1/3/4/8/134855021/zapuwojolira.pdfIn PDF document text
    • https://sukorason.weebly.com/uploads/1/3/4/5/134578332/dosikon-wogefivos-zabumenelonudod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452169/normal_6007e2353efb0.pdfIn PDF document text
    • http://xasuxugadivusug.22web.org/vijupifegalajogeneki.pdfIn PDF document text
    • http://sellforce.ru/garageband_export_midi_filests8cb.pdfIn PDF document text
    • http://lofokumado.22web.org/correct_address_format_netherlands.pdfIn PDF document text
    • http://milanomoda-italy.site/24849046366wacrw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381105/normal_600883f1d7e29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_6037ca660913c.pdfIn PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/fabatu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mewugibi.rf.gd/18277675489.pdfIn PDF document text
    • http://kediresij.epizy.com/jetusutavulubuguwiva.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/bed_sheets_duvet_online.pdfIn PDF document text
    • http://wukatimenafised.rf.gd/software_de_monitoreo_de_red_gratis_linux.pdfIn PDF document text
    • http://lorojol.rf.gd/widosalifamejukaxapazutoj.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/bibbulmun_track_map.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/what_kind_of_knife_is_best_for_self_defense.pdfIn PDF document text
    • http://kodireso.epizy.com/binufom.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/70110605912.pdfIn PDF document text
    • http://javasuk.epizy.com/factual_report_text_structure.pdfIn PDF document text
    • http://gedikoti.epizy.com/how_to_be_an_ideal_team_player.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE897 5336 bytes
SHA-256: 2d330250009cc177c4044805113b23025436351e122650a1ec754de874c31b69
font_01_sfnt_off0000fa9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9E 10472 bytes
SHA-256: f7b8f38a486eab09c279a16b250acc419372d9dc7dc4d8190db27b99e300c92e
font_02_sfnt_off00011e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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