Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed594ee2dfe7c040…

MALICIOUS

PDF

79.3 KB Created: 2021-05-12 10:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30521e0cb8d9aaab3edea31ca1b7b9b1 SHA-1: 988dab734b316cdc8bbb2f61c921c0f66f2f6ce4 SHA-256: ed594ee2dfe7c0402e42c66a58744cdbe8b58ea87b4b5782eaeac5adce0b747a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are disguised as legitimate documents or resources, but ultimately lead to potentially malicious domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host malicious content. The presence of a critical ClamAV detection for 'Pdf.Phishing.Trojan' further supports the malicious nature of the file. The document body, though heavily obfuscated, contains references to a 'defensive driving course coupon code', suggesting a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=nsc+defensive+driving+course+9th+edition+coupon+code
    • http://tetiviguxawik.getenjoyment.net/angulos_entre_rectas_paralelas.pdf
    • https://cdn.sqhk.co/balapakufogo/0iijcZp/desktop_backgrounds_hd_wallpapers.pdf
    • http://kerutugizuxig.mygamesonline.org/11945263989.pdf
    • https://cdn.sqhk.co/kawurefeki/OgjjjCE/history_of_christmas_ornaments_in_america.pdf
    • http://posiximuteg.sportsontheweb.net/satepunuzizegimilowoba.pdf
    • https://zalirojojates.weebly.com/uploads/1/3/4/6/134606979/xozotalino.pdf
    • https://kekorozonositen.weebly.com/uploads/1/3/2/7/132710750/voderoditagu.pdf
    • https://cdn.sqhk.co/wirowanorax/VNOCJih/vonepetiguzopenolelafibu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pevogikuxupeja.onlinewebshop.net/javulom.pdf
    • https://s3.amazonaws.com/podawakumepewez/spotify_premium_apk_free_music.pdf
    • https://s3.amazonaws.com/fujadabez/patricia_berdichevsky.pdf
    • https://s3.amazonaws.com/pazatuv/can_i_control_my_philips_tv_with_my_phone.pdf
    • https://s3.amazonaws.com/falevi/leg_of_lamb_red_wine_match.pdf
    • http://motuvogipe.onlinewebshop.net/6252351827.pdf
    • https://s3.amazonaws.com/zibenoroduzuw/medinijuxodepusiguku.pdf
    • https://s3.amazonaws.com/futamo/75030303392.pdf
    • http://vujijemu.atwebpages.com/general_election_to_lok_sabha_result_2020_form.pdf
    • https://s3.amazonaws.com/ravuxudibure/jixaragipowodusa.pdf
    • http://zuputes.atwebpages.com/gitexuwufonufakafedo.pdf
    • http://wegugoleta.onlinewebshop.net/excel_vba_attach_file_email.pdf
    • https://s3.amazonaws.com/bulolimepol/37646698636.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f63e.bin
b38d898d69219d7a94c391bf3fbc7562b4db63444604ffb58a821afb24158767		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF63E 5360 bytes
font_01_sfnt_off00010889.bin
960f2a35f6d9c92b5b25718b192af7860decae70f22e27e67cb1c25909b5781f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10889 11788 bytes

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