Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2ad87b78c204bd…

MALICIOUS

PDF

76.7 KB Created: 2021-04-15 00:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a73c2d5ba24d2a0beca5ef269a3a6240 SHA-1: 4536a1dd234e007f797c87d1ce130dc74a4d5039 SHA-256: 9d2ad87b78c204bde252e90bb45de8efe902d4325465f66db03a22397c82cddb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://mezovuduw.ru/strik?utm_term=how+to+program+honeywell+thermostat+chronotherm+iii PDF link annotation
    • http://buvalopexur.mygamesonline.org/big_green_egg_table_diy_plans.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://butapakenora.weebly.com/uploads/1/3/1/8/131871909/2197213.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/33896475092.pdfIn PDF document text
    • http://biomanua.website/89197201561jw6up.pdfIn PDF document text
    • http://hook-up.fun/what_are_the_3_levels_of_organization_taskse29fm.pdfIn PDF document text
    • https://gamuxexa.weebly.com/uploads/1/3/5/2/135296165/9992599.pdfIn PDF document text
    • http://klossheff.xyz/dans_lattente_dune_rponse_favorable_de_votre_part_je_vous_prie_dagrercauuv.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/articulaciones_de_los_huesos.pdfIn PDF document text
    • http://evromotors.net/637772335531480m.pdfIn PDF document text
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/nasil_sixekunakenizi_tuwudix.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://fubavinexazixo.onlinewebshop.net/89475036625.pdfIn PDF document text
    • http://kopolug.myartsonline.com/naritibulojuduwib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a058d63-29a4-4209-aa01-db6f9d97637d/magubizabirozonaxuwepev.pdfIn PDF document text
    • http://badamowafe.onlinewebshop.net/apex_developer_guide.pdfIn PDF document text
    • http://pixafur.atwebpages.com/building_management_system_course_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3276aad8-6542-404d-aa20-9e7344c1aae6/31033978018.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_off0000deee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEE 5288 bytes
SHA-256: f1774b615afc1dc5c86ec0f339453270e13602cf7ac6da6f9bb5217fdd7341c3
font_01_sfnt_off0000f0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CF 11520 bytes
SHA-256: 62b386337645cffca3ed67d8d086f0be7536de6889cf1cbe1e43a5fd413931c4
font_02_sfnt_off0001174f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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