Malicious PDF — malware analysis report

Static analysis result for SHA-256 0858dd6775368622…

MALICIOUS

PDF

77.1 KB Created: 2021-02-11 15:33:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 35153153998bf3f369c6ab7c7cb86c2b SHA-1: 67ec0683c2aab9f7708d2413fa478fda7eb46f15 SHA-256: 0858dd67753686227a7878bba807aba440256f722291ca765402c9409d62dd1a
124 Risk Score

Malware Insights

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

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 0.8018

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://maypoin.ru/aws?utm_term=ccrn+renewal+form PDF link annotation
    • http://lifeit.pro/printable_butterfly_wings_templatel2j4u.pdfIn PDF document text
    • http://muzojumovove.iblogger.org/oecd_transfer_pricing_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/vujejanar/2eB9She/warhammer_fantasy_high_elf_name_generator.pdfIn PDF document text
    • http://givepamodugag.22web.org/xivos.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/gHRXHJn/jofonu.pdfIn PDF document text
    • https://cdn.sqhk.co/voguzasijur/EeCiiha/42237404198.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuwene/Mgfgijg/xikefupo.pdfIn PDF document text
    • http://itawegan.space/the_land_foundingod3wg.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/gijihgl/auto_tops_upholstery_savannah.pdfIn PDF document text
    • http://rkconstructionsucks.com/the_crew_hidden_carehu4b.pdfIn PDF document text
    • https://cdn.sqhk.co/vekepafate/6hfLgj0/video_download_for_tiktok_easy_tool.pdfIn PDF document text
    • http://grantmedica.ru/sasebewidedafotagoglzffo.pdfIn PDF document text
    • http://bubiver.iblogger.org/georgia_motor_vehicle_bill_of_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/vusabutam/dV2LQ4x/zubisogetoj.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/jheHidd/safari_park_tickets_dubai.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fumibomi.epizy.com/motivation_letter_for_job_example.pdfIn PDF document text
    • http://selaxarizipa.rf.gd/32719995228.pdfIn PDF document text
    • http://veruzixiki.rf.gd/caramelldansen_beat_saber.pdfIn PDF document text
    • http://xaposekesudonod.epizy.com/3050844473.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/rofaxesota.pdfIn 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_off0000faf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF2 4624 bytes
SHA-256: c46718a8dba605f1d0f56c1fd75c38596037035796ff6d26e256ae5653427be2
font_01_sfnt_off00010a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A97 11384 bytes
SHA-256: 395e4aae73eb78ecdcad171ea33e554b1338ddb296b75251bca812cf6bb522e0

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