Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c4fce592cd08f4…

MALICIOUS

PDF

79.0 KB Created: 2021-05-10 12:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 82e5fc3b98e8fbdfe7af2abe20c73326 SHA-1: 9b050c57ea8dc5b3734a0d5634d65851ce833374 SHA-256: 97c4fce592cd08f4f6c1ae8673f6a38330f630d53c62f19e807be0f5065a2389
156 Risk Score

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 0.9998

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 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.
  • 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://jacksth.ru/strik?utm_term=heir+to+the+empire+pdf PDF link annotation
    • https://dixatobuvug.weebly.com/uploads/1/3/5/3/135321084/dixavevili-muribadav-sisosatedi.pdfIn PDF document text
    • https://sowewazapuk.weebly.com/uploads/1/3/4/3/134364424/47222e155e.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/7272328.pdfIn PDF document text
    • https://raputaluwim.weebly.com/uploads/1/3/1/6/131606275/jutozuj.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/rawesaragegugar/18415884603.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/duziwipasudugedijefanidu.pdfIn PDF document text
    • https://5a98ae10-8c7e-48da-b83f-9bcbc644cfa3.filesusr.com/ugd/9a8764_4237768224a54196b9a719b39d977cf5.pdf?index=trueIn PDF document text
    • https://a9b7993f-6967-48c1-a2c3-d5bc86fe985f.filesusr.com/ugd/ea2be3_263a1aa8cbea4f959dde54bc4a5f4c91.pdf?index=trueIn PDF document text
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_2b71cfbe35c6486da1d50ac1d7400855.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libeganot/insinkerator_56_installation_video.pdfIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_2edf1db1d305480d8597da28d4cf4e4c.pdf?index=trueIn PDF document text
    • http://jeborawaleko.atwebpages.com/76708077430.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/42607473726.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/anthropometric_dimensions_of_the_human_body.pdfIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_ce3d449e95a14e59bd90011b37958484.pdf?index=trueIn PDF document text
    • https://a44a9d9e-3ce9-422e-9b5d-83ef2d4925cb.filesusr.com/ugd/3234e9_277d4920031b47178f3c248dff112547.pdf?index=trueIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/how_do_you_clear_a_low_battery_on_a_2gig.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57B 4824 bytes
SHA-256: 346b819b8bb677405286a67d641e64c42eee03f569876457dc7f427a17daaf3a
font_01_sfnt_off000105b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B7 11576 bytes
SHA-256: 822e4f6ba2f29759c94dd19c12204bd4d12ae2191f9978446ee331398ff17a64

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