Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1a0dec1546484a…

MALICIOUS

PDF

67.9 KB Created: 2021-03-11 02:57:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05b40b4ae9703b1cb40a8358c9492a8d SHA-1: 47b6f8bf7578f4ec23cee29c08c1dbbe5a2db4bc SHA-256: cd1a0dec1546484a6298ebc5f2433d1aa027df65711954aa743eeb24ad358242
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The primary URL, 'https://jottigo.ru/award?keyword=cours+arpentage+et+topographie+pdf', suggests a lure related to surveying and topography. While no scripts were explicitly extracted, the PDF structure and the high ML score indicate malicious intent, likely to redirect users to malicious sites or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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-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
  • 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://jottigo.ru/award?keyword=cours+arpentage+et+topographie+pdf
    • http://elinekici.online/dell_u2410f_weightfv1ar.pdf
    • http://vosajizegek.mypressonline.com/derunixofugejumibolivepa.pdf
    • http://oneitshop.pro/mabisofi8tbbi.pdf
    • http://winoxolupuvil.getenjoyment.net/can_you_bake_pizza_in_a_toaster_oven.pdf
    • http://kiwenalod.medianewsonline.com/5783953507.pdf
    • http://jalazekesofijot.medianewsonline.com/kedaripolupewitadewoje.pdf
    • http://taforojujutusig.mygamesonline.org/postal_form_3600-ez.pdf
    • http://slampochka.ru/toxicwap._com_series6rl4r.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vufupu/how_to_put_garmin_edge_530_in_pairing_mode.pdf
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_65a0c2116a7443e5afa893be53564878.pdf?index=true
    • https://f61a8d15-835b-4c36-a3db-e4ead73ab13f.filesusr.com/ugd/e9f5f3_1a2b2aced9094203bde30f9eecc90f60.pdf?index=true
    • https://s3.amazonaws.com/wanasuvedigo/how_fast_is_a_srt_hellcat.pdf
    • http://kewetanetoza.atwebpages.com/cuisinart_dcc-1200_coffee_maker_parts_list.pdf
    • https://s3.amazonaws.com/runuzitexokol/thebes_academy_for_management_and_information_technology.pdf
    • http://vedixemalirugi.atwebpages.com/brainstorming_teaching_method.pdf
    • http://zutugidod.onlinewebshop.net/how_to_replace_a_fan_clutch.pdf
    • https://s3.amazonaws.com/vonusirukete/scatter_plot_worksheet.pdf
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_5d772b756b184292a00897006a72d3d0.pdf?index=true
    • https://s3.amazonaws.com/woxotopapozokev/54682269511.pdf
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_6057a264074a4df4a880d9d56418c123.pdf?index=true
    • https://s3.amazonaws.com/tigewibejageju/rubajenexo.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2de.bin
9807d538f78aacc01eb1c7f225cb3c916b6cb583006147dc9205e2a53e973fee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DE 5176 bytes

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