Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2999e96b4abfaeb…

MALICIOUS

PDF

71.2 KB Created: 2021-04-07 03:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: dab78b9ce4d03b978bfa076638b85d41 SHA-1: 0311f2a218e78911bdd13d0ac99c4981ac3c7a4f SHA-256: a2999e96b4abfaeb67c9df0f4c6fba4de71cc408cdce83fbd3c010334da602bc
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, including one pointing to 'lozipotod.ru', suggesting it is part of a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure flagged by heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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/wix?keyword=pharmacology+lecture+notes+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484612/normal_5fcc0a9a62d12.pdfIn PDF document text
    • http://sis-paypal.com/vewubatebaruxokorafesuval3cbp.pdfIn PDF document text
    • https://cdn.sqhk.co/xavipinav/gcVjfgc/miniature_golf_anaheim_hills_ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385613/normal_60498996e191f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411915/normal_606a58a2373ec.pdfIn PDF document text
    • http://siankaanmexico.com/448107196333ccyx.pdfIn PDF document text
    • http://abreudesigns.com/how_many_calories_in_100g_of_green_saladhso0f.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/cidjdvo/fubevi.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/PUqgdiI/domorunediniz.pdfIn PDF document text
    • http://itabody.space/401958886850j1i7.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/bgdgcoN/27244463599.pdfIn PDF document text
    • http://korefubelexusiz.medianewsonline.com/70404910096.pdfIn PDF document text
    • http://liketime.online/jaxopozerete899ha.pdfIn PDF document text
    • https://cdn.sqhk.co/fogunivugame/LhdUgiZ/python_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_6023dddcd9b53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/penaguw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8246eda3-ca18-4435-a0b6-b2ae9cd91b6d/maze_runner_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a7823e-ee59-4ad9-8de2-716be9a1fac0/41952041705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/402070c8-2037-42a0-921c-e1ec7901b1b1/html_css_js_interview_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff41fa41-ef0e-4015-be6c-564049e99f8c/36119756538.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/project_management_institute_pmi_project_safety_management.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/assassination_of_rajiv_gandhi_subramanian_swamy_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44dab66d-9d18-46c2-a01e-ff14df557359/49427986015.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/heat_transfer_worksheet_6th_grade.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_off0000d6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F1 5764 bytes
SHA-256: 5b352a2d607190e210573f762ad8ef90ce106e21faf8a46eb37e9e67b6c64099
font_01_sfnt_off0000ea81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA81 10164 bytes
SHA-256: 6a080a78252841bc98569123c4c6e465936d961fb6026d17d8551ed9a81a3f33

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