Malicious PDF — malware analysis report

Static analysis result for SHA-256 9389862111b9ec53…

MALICIOUS

PDF

69.9 KB Created: 2021-04-10 22:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 90290fc6faf3f2295d32af46c2795587 SHA-1: dba5a2027d2305ce4c8b3c13bb498033ba583434 SHA-256: 9389862111b9ec53c6604e0237cce0fa6a6755e870db5e5ca6dfff156574f8c9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=regular+and+irregular+verbs+worksheet+grade+4 PDF link annotation
    • http://hd-cam-mirror-up1.club/affidavit_of_service_form_missourit4o3c.pdfIn PDF document text
    • http://onlyforyou.space/cido_cianidrico_frmula_molecularwiw5x.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/lfgjEii/takeout_restaurants_open_late_in_memphis.pdfIn PDF document text
    • http://christmas-gift.ru/56495223335h7tiy.pdfIn PDF document text
    • http://sait-ok.ru/tanoxumeritexuwanebawai5ihf.pdfIn PDF document text
    • https://cdn.sqhk.co/rafatuvolix/SF3AGPY/uncertainties_meaning_in_telugu.pdfIn PDF document text
    • https://gaxiworet.weebly.com/uploads/1/3/1/4/131408942/zewerasozos-daminal-koniga-bazijatuz.pdfIn PDF document text
    • http://insta-sale.site/wesovidumexamawevos98pgd.pdfIn PDF document text
    • http://ukranews.site/sterile_tile_rimworldv5ui9.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/WljhedC/20788385871.pdfIn PDF document text
    • http://neuroncraft.online/notukagodenefopam94yho.pdfIn PDF document text
    • https://xudidetopos.weebly.com/uploads/1/3/4/5/134579215/1afac34ae9a061b.pdfIn PDF document text
    • http://winclean-shop.space/19594614155v41h2.pdfIn PDF document text
    • https://cdn.sqhk.co/simizekovogi/fW3ZMij/mech_arena_robot_showdown_mod_apk_download.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/gelawiweza/binary_decimal_hexadecimal_conversion.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/44008394760.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/99820266786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61291315-3c8a-4917-b09d-138d21128d48/35228833447.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/modekegewexidixub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e331436-1b7c-4e2b-be65-1c5374c8b688/the_book_thief_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c152f8-d368-4f3e-8dc1-ca8a6dfdb9f4/nufomebagikajafemaji.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42A 5540 bytes
SHA-256: c9e6e1a3c2ea96d84b1a0bcaf0ddd6ae0d427dd8a9e293def8f29fa0b9af6c72
font_01_sfnt_off0000e718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE718 10160 bytes
SHA-256: 4338186276ee8da351c29adbdfe0c47c44309d57343bd2e73ba92d70ae0cf1a7

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