Malicious PDF — malware analysis report

Static analysis result for SHA-256 42897684f7515875…

MALICIOUS

PDF

82.1 KB Created: 2021-04-03 22:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c552f359c12b96199282246f07b06d7a SHA-1: 1a5381d53273011b52714ce58e76c56f10d3cee1 SHA-256: 42897684f7515875a43dbaa2d1ee4d14096f148b5752fedd6c3e004bd8a45edc
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=awaken+the+giant+within+by+anthony+robbins+pdf PDF link annotation
    • http://nirenodeba.medianewsonline.com/69824839447.pdfIn PDF document text
    • https://dibovasejul.weebly.com/uploads/1/3/1/0/131070518/numerivopirofip_wasitol_narogupoxewu_mefesu.pdfIn PDF document text
    • https://verefatodefi.weebly.com/uploads/1/3/4/7/134722939/a3dcfda.pdfIn PDF document text
    • https://rikedinodewo.weebly.com/uploads/1/3/5/3/135323941/napukudebufalam.pdfIn PDF document text
    • https://fozujivopaj.weebly.com/uploads/1/3/5/3/135303700/435140.pdfIn PDF document text
    • https://vazejaxos.weebly.com/uploads/1/3/1/3/131382607/012302795f166a4.pdfIn PDF document text
    • https://rujavuxubigiwak.weebly.com/uploads/1/3/4/3/134331492/golet_divuko.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/how_to_use_logitech_wireless_keyboard_k400.pdfIn PDF document text
    • http://kiwirixup.22web.org/32749383456.pdfIn PDF document text
    • https://fekobuwag.weebly.com/uploads/1/3/1/8/131858403/detafufa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443588/normal_5fefa1df8c893.pdfIn PDF document text
    • http://gikafowezogupij.mywebcommunity.org/asset_lifecycle_management_process.pdfIn PDF document text
    • https://nitikado.weebly.com/uploads/1/3/4/6/134660078/fukovexanuxov.pdfIn PDF document text
    • https://fumabufoduf.weebly.com/uploads/1/3/5/3/135313851/2263866.pdfIn PDF document text
    • http://gopubewigofopa.iblogger.org/comala_workflow_report.pdfIn PDF document text
    • http://zokiwedilar.mypressonline.com/equilibrio_acido_base_ejercicios_resueltos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475380/normal_5fdaaf1f2df8b.pdfIn PDF document text
    • https://rekeboko.weebly.com/uploads/1/3/4/8/134899800/pabiserodukisep.pdfIn PDF document text
    • http://pixidilivutep.medianewsonline.com/how_to_charge_trolling_motor_battery_with_solar_panel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lubuzozerewa.rf.gd/vcds_lite_1._2_crack.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_off0001045b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045B 5660 bytes
SHA-256: 0fc8071f10eab70f3e9155d8387739f92aa01acfa12f28789b4e1dfa1bf079cb
font_01_sfnt_off000117b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B2 10304 bytes
SHA-256: 90178325fd22f81abc3ebc890df7a52d8e32ee2ba9b1b34726c362e124a5b152

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