Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dfd2954d525793c…

MALICIOUS

PDF

75.0 KB Created: 2021-04-25 00:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4896a87a56d9c8a01f16f56b1e4d7c00 SHA-1: 5312ee613e3aa3ae93aca44733dffb311d9eed10 SHA-256: 2dfd2954d525793cd55320739fbfd8414d26bc085a151d36ff419d7d21dc1861
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://jacksth.ru/strik?utm_term=charter+remote+control+settings PDF link annotation
    • https://cdn.sqhk.co/nijusukelok/0jgZicW/93429873482.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/jabTR2X/hill_climb_racing_game_online_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_6054335adfe6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479684/normal_600154bb308d8.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/Arx7ifX/3016607904.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476936/normal_5fdeea03e39bc.pdfIn PDF document text
    • http://xezojugudapele.iblogger.org/adding_and_subtracting_like_fractions.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/e5Tcib2/lapagi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_6016c4495d8e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389805/normal_5ff1591828bdd.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/mokamoba/administrao_estratgica_de_servios_gianesi.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/hp_photosmart_c4280_printer_cartridge_not_detected.pdfIn PDF document text
    • http://serinuzosazojup.epizy.com/data_retention_policy_template_gdpr_free.pdfIn PDF document text
    • https://e42ce0b3-f376-4cb5-9abe-507fdbb9570c.filesusr.com/ugd/603474_ad140f09fbd446a3bae25912d5a7dcae.pdf?index=trueIn PDF document text
    • http://kadoxosin.atwebpages.com/61849510487.pdfIn PDF document text
    • http://womidelere.myartsonline.com/caida_libre_fisica_formulas.pdfIn PDF document text
    • http://zekonumusew.rf.gd/autocad_2020_tutorial_book.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/can_i_get_disney_plus_on_my_old_lg_smart_tv.pdfIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_ac9b8c913c5244b2b0d17ebe58249ec2.pdf?index=trueIn PDF document text
    • http://wopojofa.atwebpages.com/20210265320.pdfIn PDF document text
    • https://c9107794-7b31-4e5c-84de-5db174abdfaa.filesusr.com/ugd/aabf5f_ffb86e2c0e10419c93032fa3111b5bdc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jimugivos/proform_treadmill_repairs_service.pdfIn PDF document text
    • http://jezuguxefigowi.rf.gd/john_deere_310a_backhoe_manual.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_off0000e710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE710 5116 bytes
SHA-256: 0f11d1b4f69b58e47dca1c9d27979e3a0e3c595ef7d44ea2e02d5f37a8a8064b
font_01_sfnt_off0000f846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF846 11600 bytes
SHA-256: 90f9aa13f01338845a687c73a97ba05216254b84db5ec29dc114c6d3100ab3d0

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