Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48c804cbcabfe57…

MALICIOUS

PDF

86.3 KB Created: 2021-03-13 22:09:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 598672d74176bec24effbdd713c2402d SHA-1: ccba5707df2164a089c39674020036329e425f34 SHA-256: d48c804cbcabfe57edc70cb429be2c9ff1d9fa27f8a67694647ced6a3d305c6a
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 0.9996

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://vilenefex.ru/wix?keyword=kt-8900d+user+manual PDF link annotation
    • http://siwosupegejolop.medianewsonline.com/wowifapirusonivezawemulu.pdfIn PDF document text
    • http://rezexepenoma.scienceontheweb.net/ziwijusijofagetavaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486192/normal_5ff2e8cc3d8bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_5fd3104bbbcbd.pdfIn PDF document text
    • http://xovuwowim.mypressonline.com/ceramica_cleopatra_catalogue_2020.pdfIn PDF document text
    • http://kiluzilaw.sportsontheweb.net/satokataliwazudili.pdfIn PDF document text
    • http://xarapover.mygamesonline.org/room_on_the_broom_picture_book.pdfIn PDF document text
    • http://pejelurim.getenjoyment.net/99_names_of_allah_in_bangla_free_download.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/network_security_free_download.pdfIn PDF document text
    • http://zeridojatis.iblogger.org/introduction_to_astronomy_and_astrophysics_zeilik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://falisetiven.epizy.com/gakogaj.pdfIn PDF document text
    • http://zexubadisaki.rf.gd/zutowazesax.pdfIn PDF document text
    • http://bajewilogofiro.epizy.com/50784642595.pdfIn PDF document text
    • http://vixugow.epizy.com/88479239810.pdfIn PDF document text
    • http://lobidirubegevil.epizy.com/44474457943.pdfIn PDF document text
    • http://munugarufidapob.rf.gd/boysen_reservoir_weather_report.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/cuanto_tiempo_puede_durar_una_crisis_de_migraa.pdfIn PDF document text
    • http://muloluj.rf.gd/downers_grove_north_high_school_report_card.pdfIn PDF document text
    • http://risatimax.rf.gd/52233519140.pdfIn PDF document text
    • http://rodudupisebi.rf.gd/86862063534.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/ejemplo_de_un_guion_teatral_muy_corto_para_nios.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/sapubamujomefajeworufosi.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_off00011091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11091 5464 bytes
SHA-256: addc7ad901f2d961c0d14b7b3c627f0c7c80c0bc82ef66ac597be268644e106f
font_01_sfnt_off00012313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12313 11524 bytes
SHA-256: 046015fd61f657ff59f8cbea81a376d76141e92ff2921893e12cbcf4eb0bc406

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