Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df5700cda6886e4…

MALICIOUS

PDF

69.6 KB Created: 2021-02-02 12:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7cf54b79fbfcbe15f24372376eeda0e8 SHA-1: 26b707ef00cbda2dbd754b096faeaf1b894b9cfc SHA-256: 9df5700cda6886e45b58f648ef2051c7d640292c4a0c98c6490afa032fcc7145
136 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including PDF_SEO_UTM_REDIRECTOR_LINK and ML_NYX_PDF_MALICIOUS, indicating a phishing lure disguised as a free download. ClamAV detection further confirms its malicious nature. The embedded URL, https://baarspo.ru/aws?utm_term=classroom+action+research+pdf+journal, is likely the initial point of contact for delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://baarspo.ru/aws?utm_term=classroom+action+research+pdf+journal PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490917/normal_5fde9605b90b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454668/normal_5fce0d44678ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465564/normal_6002ae63a0d89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_5ff71234e2e6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486033/normal_5fefdda9794e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489054/normal_5fdd6240274df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466398/normal_600631d790476.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/bisazabe/70494260993.pdfIn PDF document text
    • http://lepomosafajuki.rf.gd/miwidizujipobewuge.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/albert._io_answer_key_ap_lit.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/android_sdk_manager___windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/42029588874.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/murottal_an_naba_muzammil_hasballah.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/almost_human_book.pdfIn PDF document text
    • http://soxixebupi.rf.gd/55581350149.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/beyond_two_souls_review_game_informer.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/vumoleruxuzube.pdfIn PDF document text
    • http://repujatadaw.rf.gd/angelina_paris_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/70411556260.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_off0000d2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F3 5376 bytes
SHA-256: f06444570465c91e3ab99151d1a020583a9c30f5f400d796a01a2a83efcd96dc
font_01_sfnt_off0000e513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE513 11076 bytes
SHA-256: c80d29b51d578e409f7b6dd3711c9c0b0699556398957497648c18dc113399af