Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b4d9c900a4eefa…

MALICIOUS

PDF

70.5 KB Created: 2021-02-20 21:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 06f23347954857f671e0c2977f8ddf30 SHA-1: 737130f2e207e8451a7b267b4a814f8e53e2951d SHA-256: 07b4d9c900a4eefa683de6a748358771e4af2d41e4e1ae59df39fc76a9e55e66
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains embedded JavaScript and a large number of external links, indicating it is designed to redirect users to potentially malicious websites. The heuristic firings, particularly the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM', strongly suggest a phishing or scam attempt by creating a link farm. The embedded JavaScript likely facilitates the redirection or exploits vulnerabilities, contributing to the overall malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/wix?keyword=danfoss+hvac+drive+manual PDF link annotation
    • https://cdn.sqhk.co/loxowopiv/Jjcgixg/24167718215.pdfIn PDF document text
    • http://brandframeb.com/implement_boolean_function_using_multiplexeralkg2.pdfIn PDF document text
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/wiwinix.pdfIn PDF document text
    • https://wuremuzagatixob.weebly.com/uploads/1/3/4/6/134612401/setufi.pdfIn PDF document text
    • https://jasugupaxawuz.weebly.com/uploads/1/3/0/7/130740610/28159.pdfIn PDF document text
    • https://dofuzubakav.weebly.com/uploads/1/3/1/6/131606612/jegus.pdfIn PDF document text
    • https://ladupizisegi.weebly.com/uploads/1/3/1/3/131380895/mavojagugemex_vivojole_xijesu.pdfIn PDF document text
    • http://arenaprobet.com/game_azur_lane_mod_apk9mrsc.pdfIn PDF document text
    • http://pasoxegidameso.iblogger.org/kinds_of_sentence_according_to_purpose_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/rojozedofaf/yMhjjby/mepefezamokedubuxife.pdfIn PDF document text
    • http://bellissimo.online/11794911889efnbq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402507/normal_5fd04a28b9c1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453560/normal_5fee7de60e3b7.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/Fhgk767/epic_games_launcher_lagging_pc.pdfIn PDF document text
    • http://milanbeach.fun/31023443649d2aft.pdfIn PDF document text
    • http://fudomux.22web.org/wefomulawiropab.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/java_tutorial_by_sun_comedf79.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/gjgighh/the_best_of_marvin_gaye_greatest_hits.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74C 5320 bytes
SHA-256: 6070d60e8299529f4d6296bedb982d64f515543232391f2fb992f746d81ed5d6
font_01_sfnt_off0000e949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE949 10428 bytes
SHA-256: d2162fd7041cfefad51829453a4157bf5fcc0661ad2fbb0f36200502a1e2924e

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