Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ca727f383aa3ef…

MALICIOUS

PDF

77.6 KB Created: 2021-03-31 20:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 47fc8fb5dcb2af31292b252bc8ef8c1a SHA-1: 5ccef4e32441ba9c0d0548429daad460c609b380 SHA-256: b7ca727f383aa3efac2bfb99fc51dfbb3ea9c3bfcaef7df227740941bd530fde
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://maypoin.ru/wix?keyword=the+giver+chapter+13+questions+and+answers PDF link annotation
    • http://introdom.ru/carrom_pool_hack_version_mod_apkqke1y.pdfIn PDF document text
    • http://creditinquiry.info/55069826109bk0k6.pdfIn PDF document text
    • http://atomyimperial.ru/a_woman_in_berlin_novelprn0f.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/elite_platinum_pressure_cooker_recipesoxz3g.pdfIn PDF document text
    • http://picsonair.com/lyrical_dance_songs_dance_momsm1lh0.pdfIn PDF document text
    • http://eurostore.info/who_is_the_new_chaser_going_to_bexrohk.pdfIn PDF document text
    • http://mamuxorap.getenjoyment.net/telecharger_carte_du_monde.pdfIn PDF document text
    • http://gidonuvawugirid.medianewsonline.com/importance_of_globalization.pdfIn PDF document text
    • https://wezuzasiteva.weebly.com/uploads/1/3/1/3/131397996/bopesa.pdfIn PDF document text
    • http://piredvizhnik.com/sidikefelegiliwugilpgy9y.pdfIn PDF document text
    • http://robot3.site/tajibixagazusiguvozr1o2.pdfIn PDF document text
    • https://lapimirisa.weebly.com/uploads/1/3/4/3/134372347/lenom_vusur_tepagazuwonev_siwejokavuwaxo.pdfIn PDF document text
    • http://freds.space/mendeley_abnt_styletplou.pdfIn PDF document text
    • https://menudobuwowewil.weebly.com/uploads/1/3/4/7/134765252/nerusat_toreduzolotu_mevivosefe_bexozuzo.pdfIn PDF document text
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/xigajowewimoniluwi.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/duxafimebito_donulijixejojo_vijotilawuwima.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/gapuruxumeg/rebofasube.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/facebook_ads_guide_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f071e21c-5645-46ad-a23d-24cf016c9158/65087603571.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/superficial_vein_thrombosis_treatment_guidelines_accp.pdfIn PDF document text
    • http://gepafelixadu.onlinewebshop.net/riesgo_cardiovascular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83163e29-a348-475e-8dec-1d2f94360617/i_am_that_girl_song.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_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 5744 bytes
SHA-256: ee9b2cb8eb1f35f31b17611ea0aa9405ae32d37c620e3900903976beb5ba3a37
font_01_sfnt_off00010466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10466 10752 bytes
SHA-256: ce51de381dcb40ece47935eed024c0f42bcffab9c15baa9d8b53c18983e2d80a

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