Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd1003ab3644b6a…

MALICIOUS

PDF

80.3 KB Created: 2021-03-28 00:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8df94bf4117fa8c6fce92721456f02e4 SHA-1: 210bfdc7ac189a86a5497504c3593fa4a6990181 SHA-256: fbd1003ab3644b6ae967cd7a95bb8cdf0beb6c03acfc506562c32635a68dddb8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1555.003 Credentials from Password Stores

This PDF document was flagged by multiple heuristics as malicious, including a critical ML classifier and ClamAV detection. It employs a critical lure related to recovery secrets or private keys, suggesting a phishing attempt to steal sensitive credentials. The document also contains numerous external URIs, with one pointing to a suspicious domain associated with a potential link farm, indicating a likely phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/123?utm_term=udemy+certificate+template PDF link annotation
    • http://free-at.pro/477869759721ezz.pdfIn PDF document text
    • http://rezisekuvaz.mypressonline.com/4591365474.pdfIn PDF document text
    • http://jexekiraj.sportsontheweb.net/theodor_adorno_on_popular_music.pdfIn PDF document text
    • http://tuwuradozanava.iblogger.org/nemesis_board_game_rules.pdfIn PDF document text
    • http://geparup.scienceontheweb.net/why_do_they_call_the_flag_old_glory.pdfIn PDF document text
    • http://moymagazin.xyz/om_shanti_mediatbqjp.pdfIn PDF document text
    • http://pararapameso.getenjoyment.net/colored_pencil_drawing_techniques.pdfIn PDF document text
    • http://wozupabalaviv.medianewsonline.com/tuwudilom.pdfIn PDF document text
    • http://sebokuxaxugu.iblogger.org/33041945218.pdfIn PDF document text
    • http://mibemuxagegija.mywebcommunity.org/asus_sabertooth_990fx_r2_0__bios.pdfIn PDF document text
    • http://mifopevoruroga.22web.org/area_volume_worksheets_grade_5.pdfIn PDF document text
    • http://instapriz24.site/apprendre_anglais_application_androidj08yq.pdfIn PDF document text
    • http://naderuromopuru.22web.org/24249858528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zakefuki.myartsonline.com/70623044500.pdfIn PDF document text
    • http://puxabilaxomim.rf.gd/visob.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/apocalipticos_integrados.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/730b29d3-289f-43e9-9c0c-481142c8c577/can_u_build_muscle_with_crossfit.pdfIn PDF document text
    • http://zuputes.atwebpages.com/siwowarozivep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a548090-3b04-49ec-891d-a600d5ae6256/easy_way_to_draw_cartoon_girl_draw_so_cute.pdfIn PDF document text
    • http://woxedizoxe.rf.gd/vacation_2015_parents_guide.pdfIn PDF document text
    • http://norenebe.rf.gd/contract_termination_agreement_template_alberta.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC96 5216 bytes
SHA-256: c8a8148fce7f118876a7c6a844d2c58ccc4f7793c7e59fa869c34180b4393b8c
font_01_sfnt_off00010e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4B 11016 bytes
SHA-256: 4de81e675620edfffb09624414500c996a7ba974a41998b1178d2f88a0974a77

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