Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf3c2cab33aff7f…

MALICIOUS

PDF

76.4 KB Created: 2021-03-23 03:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 129199e30d6c1750e2cf71ef88d28a81 SHA-1: 7505901d04a3eaab72bfea5c173bf4cbae9c8af7 SHA-256: 8bf3c2cab33aff7fb38490ca9e315aa42d188e4c5aa12aa3b9e7f1aa272b51e4
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it's designed as a lure for free downloads, redirecting users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to trick users into visiting a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/award?keyword=stay+strong+demi+lovato+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464082/normal_5fd61aec32a8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386830/normal_6058febeef597.pdfIn PDF document text
    • http://kernig.store/bafegewifmcqpi.pdfIn PDF document text
    • http://naturapple.space/zidaw0ub16.pdfIn PDF document text
    • http://poruzur.iblogger.org/pirikifawew.pdfIn PDF document text
    • http://itfamily.pro/779777660594ipaq.pdfIn PDF document text
    • http://meetchat.space/sistema_muscular_humano_powerpointr70ms.pdfIn PDF document text
    • http://lobotazawarew.iblogger.org/oprah_winfrey_on_wayne_dyer_death.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405654/normal_601378c2226cb.pdfIn PDF document text
    • http://notdull-eng.online/goripimopaw22yeo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_602d87f414a45.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/degagaziv/mio_pony_fly_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/26421678567.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/adobe_flash_professional_bagas31.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/20204880633.pdfIn PDF document text
    • http://refuzopil.epizy.com/dj_tau_song.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/dungeons_and_dragons_dice_roll_gif.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/commercial_invoice_template_for_us_customs.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/65426968021.pdfIn PDF document text
    • http://sexupoweduf.epizy.com/780212942.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/poroxiseborukadoni.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE2 5828 bytes
SHA-256: accfa16e5aac4fe027f711a088a2f1376840b5fa9f15f97652556c6e2afefbf0
font_01_sfnt_off0000feb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB3 11064 bytes
SHA-256: 6fc301cf61750aa292ba72b638b9fb8cce1805ea9a25f3cda813538b0e1a7292

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