Malicious PDF — malware analysis report

Static analysis result for SHA-256 c79e66c90858fc0f…

MALICIOUS

PDF

76.1 KB Created: 2021-03-23 22:38:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 9f7694bd41aa78fc57b94292955cd6c2 SHA-1: edf4743e4e024c21f7b18bb1b3ba4e47491453ae SHA-256: c79e66c90858fc0ff3798e6188f29ab59ad0b6e4879f0108d8102b6dc7a2434e
134 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, including one pointing to 'baarspo.ru', suggesting it's part of a phishing or spam campaign. The heuristic 'SE_URGENCY_LURE' further supports the phishing pretext, indicating the document likely contains urgent language to prompt user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://baarspo.ru/wix?keyword=ultra+fast+keto+boost+side+effects PDF link annotation
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/titosavigi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_602417aa3158e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403262/normal_60418fc3739f8.pdfIn PDF document text
    • http://eduha.online/rinizerexuxarortkbx7.pdfIn PDF document text
    • http://presentinsta.online/clash_royale_apk_mod_elixir_infinitozgx50.pdfIn PDF document text
    • https://tuwebuliwarukor.weebly.com/uploads/1/3/5/4/135400964/7343b7c1b929dc5.pdfIn PDF document text
    • http://websecurer.tech/do_esters_smelle1bpy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420907/normal_5fd653778e49b.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/what_kind_of_pill_is_amc_875_125.pdfIn PDF document text
    • https://bafejaligaxe.weebly.com/uploads/1/3/4/0/134018432/02c5de7.pdfIn PDF document text
    • http://wonder-ita.fun/tedunedosozusexinofuzes5oie9.pdfIn PDF document text
    • http://tajuliwelofiti.medianewsonline.com/blank_calendar_january_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446016/normal_60224bc842aa7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xobebol.onlinewebshop.net/jesos.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/vedic_astrology_horoscope_compatibility.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/curso_de_aprendizajes_clave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2138ac8b-673f-4d08-b7be-592e63873498/sense_and_sensibility_2008_soundtrack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe96742-490f-469a-9ab8-4716b1a9473e/lexoduvutowezokoreduxumux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5774233d-e45b-402c-b956-e0b902e8f2c8/bissell_little_green_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/989601056.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/retawavomutemijaw.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/65413380710.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_off0000ee56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE56 5208 bytes
SHA-256: e6ca09c106ac34f7897a9f08990881d5db8a5c8211ca2084c2d1e72a52921def
font_01_sfnt_off00010024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10024 10112 bytes
SHA-256: 9f478c8e6c7432d2de974132fae4f43b8a09e6218c9893c135877e9c09e5a9e1

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