Malicious PDF — malware analysis report

Static analysis result for SHA-256 471c2f4c49ee4dc9…

MALICIOUS

PDF

81.5 KB Created: 2021-04-23 01:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 95b6c7de143b492efc82a654f05ad7db SHA-1: 5b29745cbf4afc6756237976fd3c00ccfaa16124 SHA-256: 471c2f4c49ee4dc976fe3b26653fc4fb42ec3fb9db7747736707cfd6e74def85
66 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 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 4

  • 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://botokaw.ru/strik?utm_term=razor+e200+electric+scooter+troubleshooting PDF link annotation
    • http://viwavidif.getenjoyment.net/fozagawujuvejamofilifi.pdfIn PDF document text
    • https://diziwupufetut.weebly.com/uploads/1/3/4/4/134477772/859296.pdfIn PDF document text
    • http://meetchat.space/98102368890x80pe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450158/normal_601b23ee1d9a2.pdfIn PDF document text
    • https://xitapazutirubej.weebly.com/uploads/1/3/4/8/134882608/pupaxigo-moriwaguvo-mijuk.pdfIn PDF document text
    • http://ewwe.space/daganotazukurlik6z.pdfIn PDF document text
    • http://arfesopt.com/2864986508ys66k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500208/normal_5fff123c75ba6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446502/normal_603d2c7088cfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_6021291391f3c.pdfIn PDF document text
    • https://jonimewogil.weebly.com/uploads/1/3/1/8/131860125/gomasijowuzematop.pdfIn PDF document text
    • https://wotapidedodibi.weebly.com/uploads/1/3/4/4/134475573/5248778.pdfIn PDF document text
    • http://znasila.ru/dark_raider_full_apkna84p.pdfIn PDF document text
    • http://begdas.fun/jetpack_joyride_theme_roblox_id6anzf.pdfIn PDF document text
    • http://lakuberik.mywebcommunity.org/descargar_en_antecedentes_de_la_policia_nacional.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ef911e-6a59-4a1d-828e-56f90751b05a/how_much_does_medical_administrative_assistant_get_paid.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/sap_hana_free_online_training.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/is_breville_better_than_delonghi.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/kubuwijagidukalenef.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/excel_vba_application._worksheetfunction._sum_range.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/592e9005-8fdb-49fb-bac0-af0a6eeb7f21/lusijinigojosakazoxub.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_off0001013f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013F 5532 bytes
SHA-256: 6c50e124018e905092b46e25d7ae2cca9ba2b6d6c8cea6568f3388389a14c213
font_01_sfnt_off0001140d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140D 10708 bytes
SHA-256: bfa46982d19926930ce8b58f8cc175847a2fa594282790555b0de666b0d22ac8

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