Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0901fb7ca03513c…

MALICIOUS

PDF

65.8 KB Created: 2021-02-21 18:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dfd3f0925e2dacecb0da39da66449597 SHA-1: 55587a1a0df1831207d7598f3472790b6c60af55 SHA-256: b0901fb7ca03513ca6c34e019dfab6380187654eb1490b5eb499b139a5278898
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/123?utm_term=how+to+start+husky+power+washer PDF link annotation
    • http://help-verifiedbadgecenter.com/kirov_reporting_red_alert_25v5p6.pdfIn PDF document text
    • http://atlas-copco.su/geometry_and_number_theory_on_cloverszharh.pdfIn PDF document text
    • https://vavunoruluso.weebly.com/uploads/1/3/1/0/131070491/6736099.pdfIn PDF document text
    • https://mawubikafef.weebly.com/uploads/1/3/4/8/134871360/gojuduv-kujazegesar.pdfIn PDF document text
    • http://trackcreditscore.info/stock_market_hours_of_operation_tomorrow7v3kp.pdfIn PDF document text
    • http://aarbuz.space/ghost_rider_live_wallpaper_free_downloadymhvl.pdfIn PDF document text
    • https://xuxulavadimuxa.weebly.com/uploads/1/3/4/2/134234789/dagiruxezobofo.pdfIn PDF document text
    • http://rankingcoach-seo.com/lemakazazisidefalikekaja2ynun.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/dedim-vemireboxug.pdfIn PDF document text
    • http://runolive.com/xewekewobisejifep3p0il.pdfIn PDF document text
    • https://resigigemi.weebly.com/uploads/1/3/5/3/135326159/riviserezo.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/farefasejikap/tiwalurefulilobuzulemani.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/74651562924.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/invasive_aspergillosis_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/boardman_22_function_bike_computer_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/72224532.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/xevejipalizaraza.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/26847950557.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/dazotutabiburogim.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/42596836314.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_off0000c4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A6 5096 bytes
SHA-256: d199f24ff587214006ea9eb23eb1e536454fc50172b2c061b874d0a0df30f7ee
font_01_sfnt_off0000d607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD607 10588 bytes
SHA-256: 89e1feb7dedfbd7c22da61ed9097b9a60e2ab8c2b267226ba5f584b781012518

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