Malicious PDF — malware analysis report

Static analysis result for SHA-256 507603f4cbcb77b1…

MALICIOUS

PDF

106.3 KB Created: 2021-03-18 15:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b85ecffad1e57a82b2a409c13cbf8d1e SHA-1: ee5ba13e81332f449530a5b14c23cf9a51e729c1 SHA-256: 507603f4cbcb77b181bedd4c92595f87b68ebcd64472b2e51671006376d71f97
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on low-reputation hosting, a common tactic for distributing malware or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://xajibur.ru/123?utm_term=church+conference+agenda+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383132/normal_601f45b132376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481062/normal_6023e29db944c.pdfIn PDF document text
    • http://dipunag.getenjoyment.net/71915427994.pdfIn PDF document text
    • https://cdn.sqhk.co/dopiporajen/fbhcqhc/plate_tectonics_worksheet_answers_key.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465270/normal_6005ddbf7bf96.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/what_are_the_10_naeyc_standards.pdfIn PDF document text
    • http://sifaritube.sportsontheweb.net/busujaladukewubad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443588/normal_5fefa22b7a98b.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/89219987276.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496816/normal_5feb05fb8b6c0.pdfIn PDF document text
    • https://cdn.sqhk.co/nowagenika/btehjaj/elite_motos_2_dinheiro_infinito_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bopiguxa.atwebpages.com/44_codigos_arcturianos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852ed1a1-f2fc-4bd5-821f-d0f2cc44f3cb/20696484876.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/bhavans_baroda_app.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/bsc4success_august_mcq_2019.pdfIn PDF document text
    • http://farovosodiwes.atwebpages.com/star_method_questions.pdfIn PDF document text
    • http://sojufuka.atwebpages.com/what_is_a_concurring_opinion_in_the_supreme_court.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70377fe6-95a9-4065-b5ea-0bfe72dfefff/wayne_dalton_garage_door_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3af39bea-e6e8-4aec-a665-f70713d592fb/dinodazelupaxabaz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DC0 5248 bytes
SHA-256: 8e192564f0f4b88f68451a16916459a161616cb32edc88c0609cd6ebb4d8133d
font_01_sfnt_off00015f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F70 14120 bytes
SHA-256: 981a66377adc952ef439006f737b8c2c68597e8ee058662d41a87f96661aee54
font_02_sfnt_off00018c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C3E 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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