Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fcad18cd94e7195…

MALICIOUS

PDF

79.3 KB Created: 2021-03-18 07:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0cd3f407aea37e0b0a30d518c340c3b3 SHA-1: 5419baeb12a0dade4c5932f74f6848940f9a6534 SHA-256: 6fcad18cd94e71956fbb3a58af466cdaf713b7349dbe162153b8286da4cce3de
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 0.9993

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://seumenha.ru/wix?keyword=can+i+build+muscle+without+protein PDF link annotation
    • http://sotarebesowula.medianewsonline.com/colibacillosis_pada_ayam.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/puxutuvewidinufizolagu.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/72895870132.pdfIn PDF document text
    • http://nikecortez.net/how_to_code_in_visual_basic_for_beginnersyjnjo.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/zalotodofozijex.pdfIn PDF document text
    • http://goodnatural.space/voraretatakexudadefekfxrq.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/sofokalufubilosu.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/how_much_do_mechanical_engineers_get_paid_in_australia.pdfIn PDF document text
    • http://kuxemanes.medianewsonline.com/lojuzavipopix.pdfIn PDF document text
    • http://chambrehq.xyz/plantar_fasciitis_exercises_espanoliapf5.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/15470729426.pdfIn PDF document text
    • http://somubuzesixuwun.getenjoyment.net/54477830449.pdfIn PDF document text
    • http://polystate.ru/vizio_e480i-b2_turns_on_then_offgkavv.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/bathroom_accessories_names.pdfIn PDF document text
    • http://vivudanu.scienceontheweb.net/tepadusefedoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/36cea29c-239d-4e33-b339-06c71e3835ac/who_voices_uniqua_on_the_backyardigans.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_5dfcac837ec54e9ba94dbc5a55994c25.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4d4ab63-4a20-49c7-a92b-84daf8b372d3/dd_4e_sorcerer_handbook.pdfIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_e9a00bdd8e8c4aef9536f54a6005ef08.pdf?index=trueIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_5a0583554a8d476bb3aa07aa2700dc20.pdf?index=trueIn PDF document text
    • http://supajiwa.myartsonline.com/pigazevisekasenowase.pdfIn PDF document text
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_2c50607713db4a9387db17482e092d99.pdf?index=trueIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_70cddb166c084cf191f7ed1d7f594016.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/129605fa-465d-402d-923d-ae67e9b22809/craftsman_front_tine_tiller_6.0_hp_26_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae83c683-fcd5-446d-a1fa-b3afdb707a79/99031411739.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_off0000f6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CA 5452 bytes
SHA-256: 6c3f29f86ce442c83dabbf9d0b10cebcf4104564746092594b449b50828eba77
font_01_sfnt_off00010927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10927 11384 bytes
SHA-256: 796f16c6d3773b007cc3103cd35666f582789d7b1620334aa9007f91a485609c

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