Malicious PDF — malware analysis report

Static analysis result for SHA-256 df724d92e7db96e5…

MALICIOUS

PDF

89.4 KB Created: 2021-02-26 09:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 94588dedf5a54a9fcc0da9da5eb1c8b1 SHA-1: 59e156b1d40213ba572a739cc26d39218a84eeca SHA-256: df724d92e7db96e553d4eebb13d4a789e8ad496e4f1181c38156055c1732c384
76 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it's a lure for free content, specifically a workout routine, to entice users to click on a malicious link. The embedded URL, https://jacksth.ru/wix?keyword=ben+pakulski+mi40+workout+routine+pdf, is identified as a redirector likely used for phishing or malware delivery. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • 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://jacksth.ru/wix?keyword=ben+pakulski+mi40+workout+routine+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412902/normal_60277521f2e5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414352/normal_603582f932322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497650/normal_60246fb875431.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483873/normal_5fde9fe53d679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460449/normal_5fd37ab98d180.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451044/normal_5ff3de5bba1bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444877/normal_600ccac56ecc3.pdfIn PDF document text
    • http://xafevak.iblogger.org/chrome_setup_filehippo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422137/normal_600adb0543a00.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/fotojipifuzitul/authorised_dealer_code_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/uniform_motion_speed_and_velocity_problems_answers.pdfIn PDF document text
    • http://pewubep.rf.gd/kojekujapireva.pdfIn PDF document text
    • http://loxexezusus.rf.gd/how_to_remove_a_hardwired_smoke_alarm.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/games_pc_2018_free.pdfIn PDF document text
    • http://bosewavim.rf.gd/trials_of_apollo_book_summary.pdfIn PDF document text
    • http://tuwemajufa.rf.gd/kujalexopomitukekixukap.pdfIn PDF document text
    • http://xikavab.epizy.com/jogevafexujebew.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/genasapuduwafazorebarafot.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/fur_elise_jazz_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/26949767625.pdfIn PDF document text
    • http://fiwabafedazuv.epizy.com/7562144958.pdfIn PDF document text
    • http://tenefotozefuzuw.rf.gd/game_of_life_board_game_versions.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/64657120622.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_off00011721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11721 5624 bytes
SHA-256: e1a72f71bb63fccccd239dfacab72f5381138822c24b9174022e255a1a586936
font_01_sfnt_off00012a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3A 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000132c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C7 10704 bytes
SHA-256: 77419d28f14b81ab42dd9ff0ef2eb5480801c34ab921188e14f595c014855980