Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07e3d529b5db17f…

MALICIOUS

PDF

74.9 KB Created: 2021-03-10 08:58:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 16980aa31413e9ab8d306bd323b5a57b SHA-1: 199b4c3b50ccb44263f72990b1c4ff03e418dfdb SHA-256: c07e3d529b5db17f7cb3ecf2e3535073efa2ae87dd6ce3245eb949cf82ac348c
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 0.9997

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://zajinet.ru/123?utm_term=muffins+halo+guide+for+blind+dogs PDF link annotation
    • http://xtina.online/bacterias_fermentadoras_de_lactosarj1cm.pdfIn PDF document text
    • http://all-system7.xyz/jowubemuwarofigikkiq93.pdfIn PDF document text
    • http://dexaputanit.mygamesonline.org/payment_of_gratuity_act_1972_icai.pdfIn PDF document text
    • http://uaportal.site/sony_usb_turntable_softwarensvo7.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/zowasadipo.pdfIn PDF document text
    • http://wopizup.mypressonline.com/how_to_align_an_ezgo_golf_cart.pdfIn PDF document text
    • http://shop-onlain.fun/smoke_detector_beeps_once_every_minutedfhpa.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/pioneer_deh-p8400bh_set_clock.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/putavu.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/69967897827o91vv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://donijexufenu.onlinewebshop.net/liftmaster_387lm_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a19cfb-8317-4789-8921-2346388a9b09/82738823709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d0bf72c-beca-4450-b97d-91f82615926e/everyones_an_author_3rd_edition_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6da4d8-1ae6-4cfd-a167-f6716243603e/rozezatugol.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/2020_lexus_es_350_f_sport_lease.pdfIn PDF document text
    • http://besafetusupug.atwebpages.com/xezujiworifimutudutebate.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/fibijinurulimed.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/lagituzuwugutewulozebu.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/ssc_stenographer_online_form_sarkari_result.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/auditoria_informatica_caracteristicas.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_off0000e537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE537 5312 bytes
SHA-256: c04251870f9d2fe6c70af9b4e712bb62ef57ffcf4f400d58e43595a436e811bf
font_01_sfnt_off0000f74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74D 11112 bytes
SHA-256: 66ed9b237be90303746fbd57e0fefe23b5bce7b3951b2d8c571299ca68f462ab

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