Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e959d934a405b20…

MALICIOUS

PDF

68.1 KB Created: 2021-04-02 06:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a133ab9ffa24122a18571b2d2a0c1e0c SHA-1: 692190c81c506e5ba3a1f93c5dbcdec660fca0f5 SHA-256: 2e959d934a405b203bc873865e6516f7eb1b19779987b4f71ee0e1fba8f8b44f
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, characteristic of a link farm designed to manipulate search engine results. The heuristic `PDF_SEO_LINK_FARM` and the presence of many unknown reputation URLs strongly suggest a phishing or malicious redirection attempt. ClamAV detection as `Pdf.Phishing.Trojan` further supports this assessment, indicating the file is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8224

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://fokemale.ru/award?keyword=american+heart+association+acls+pretest+pdf
    • https://jekufagiz.weebly.com/uploads/1/3/0/7/130739150/nalum_bidazi.pdf
    • https://cdn.sqhk.co/tefozakozup/FihLAia/4734107418.pdf
    • https://cdn.sqhk.co/konosoka/XjegezA/tiktok_follower_boost_app.pdf
    • https://povejuzulegaje.weebly.com/uploads/1/3/5/3/135301343/2691048.pdf
    • http://telgrm.site/hostage_to_the_devil_netflix8k0rx.pdf
    • https://goxuxogegeta.weebly.com/uploads/1/3/4/6/134688707/didatoladovazo.pdf
    • https://cdn.sqhk.co/savimatuv/EGEhejc/leap_disney_song.pdf
    • http://siwivelijutore.medianewsonline.com/business_school_book_in_gujarati.pdf
    • https://cdn.sqhk.co/xidodaxu/jbghXhh/bull_run_2_game.pdf
    • https://cdn.sqhk.co/xiteduva/jifEVic/64276184323.pdf
    • http://salonapp.xyz/machine_learning_bootcamp_udemyz5850.pdf
    • http://fullcreditreport.info/digugizissba9e.pdf
    • http://xsale.trade/8158457724hko9l.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_d6bcaf580048498c921fa00f96f75c85.pdf?index=true
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_d03ffa7df85a4f6eafe98200c02ffe0d.pdf?index=true
    • http://xijewixevav.onlinewebshop.net/hot_springs_prodigy_parts_diagram.pdf
    • http://bavevex.onlinewebshop.net/most_common_idioms.pdf
    • http://fafalibowadavuz.rf.gd/40129784456.pdf
    • https://e4dd5bf8-bd13-43e3-b37b-9624b2564f03.filesusr.com/ugd/093416_79a428625cbc4e8187e2110f2fab56c5.pdf?index=true
    • http://talakukatutevib.epizy.com/fivekisilajitasiduw.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc73.bin
71ece624352086fc25a2d85a93f949df07765a2746d51d07ae51eb5ab8468f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC73 5384 bytes
font_01_sfnt_off0000ee98.bin
04f7d09359fa0e756679b9f8074f18345228289fae0d8d851ca09e04da9a1efc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE98 10808 bytes

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