Malicious PDF — malware analysis report

Static analysis result for SHA-256 726e14536578139d…

MALICIOUS

PDF

69.5 KB Created: 2021-03-02 13:56:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 04bdec1a46dda2b48838b0dbf7f56b83 SHA-1: 07c6deb9110daf975d184435aab82a89242be7ab SHA-256: 726e14536578139dfded8e034a81be586f7cbea7bb61a77b257061a6435a4ecc
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it contains an external URI and an SEO redirector link. The embedded URL points to 'https://jacksth.ru/award?keyword=navy+primary+specialty+codes', which is likely used to redirect the user to a malicious site. No scripts were extracted, but the PDF structure and heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9656

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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=navy+primary+specialty+codes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466666/normal_601231f2a8378.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/GDhaP1D/bass_booster_music_player_app_download.pdfIn PDF document text
    • http://medway24.com/muruzodaduqzf.pdfIn PDF document text
    • http://silkhfig.bid/vewixasewim9x9v7.pdfIn PDF document text
    • http://bigpleasure.ru/armored_car_285vm0nk.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwutu/gVuRwGo/personal_care_aide_job_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473030/normal_5ff30ba4578ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486054/normal_5fd30c715649c.pdfIn PDF document text
    • http://xozonline.ru/zanozuzonaxoga3wr9r.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/nopomewegobij/long_division_practice_worksheets_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/ruvivunulesafizo.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/easy_cello_music.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/22944076391.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/37974045656.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/bury_tomorrow_earthbound_album.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/luvosuworufodowomolarado.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/bstc2019_org_bstcform2019_vcnt.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 5352 bytes
SHA-256: 56ed073a616808c858eebc5d629898821e41dcb7d93cb6c601d8024d6c36b2d1

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