Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d07e6c8ed69a253…

MALICIOUS

PDF

81.6 KB Created: 2021-03-03 05:13:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 2031c400500efc5bd508854ffd5637fd SHA-1: 7bf688a04af1df30292ddbfe9f99614385baf8dc SHA-256: 3d07e6c8ed69a253b85f598d095a61ba80af6d853fb2a7384ea900dcbdbaa369
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it's a phishing lure, specifically using a book title to entice users. It redirects to the URL https://jacksth.ru/award?keyword=ernest+hemingway+short+stories+book, which is flagged as a high-risk redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/award?keyword=ernest+hemingway+short+stories+book PDF link annotation
    • http://nakanilo.club/gerund_infinitive_bare_infinitivedvs8y.pdfIn PDF document text
    • http://ru-en.xyz/sandisk_16gb_clip_sport_plus_mp3_player_manualbql9a.pdfIn PDF document text
    • http://italiahot.space/lol_lux_aram_guidegub0e.pdfIn PDF document text
    • http://eglo.club/western_digital_my_cloud_software_for_macoy32i.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/543714538760oemn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382958/normal_6026b26223111.pdfIn PDF document text
    • http://igme.site/vadadikunov86a2u.pdfIn PDF document text
    • http://osmosiotzs.fun/zumixobanewodazokoidw7.pdfIn PDF document text
    • http://kupivse.xyz/como_la_flor_piano_sheet_musiccbgjt.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/wasejodekegisujonogu2hfsd.pdfIn PDF document text
    • http://samo-katim.ru/the_5_dysfunctions_of_a_team_summaryi6mja.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/dusined/shiva_cartoon_video_full_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/invertebrate_worksheets_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/27143825737.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/chaki_chaki_namak_nikal_cartoon_video.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/59891255659.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/drakor_when_camellia_blooms_sub_indo.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/29934646072.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/top_cartoon_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/altendorf_f45_spare_parts_manual.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_off000102b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B2 5424 bytes
SHA-256: 20364478d9e5bda7935e21ab14b7e31ea27d7c1567a10b07b7385cbb60adfbb5
font_01_sfnt_off00011514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11514 10380 bytes
SHA-256: f47df02ec3a8f48e8a8d4afe799336f77c9f8505fb6f7b03b7dfbb4316af2b69

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