Malicious PDF — malware analysis report

Static analysis result for SHA-256 11fddbbaeb002de1…

MALICIOUS

PDF

107.1 KB Created: 2021-02-23 01:04:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6717b408e7ba8f237d4860c412875f4c SHA-1: 1b615e0e085a822d777569d93533b8af15f3efa3 SHA-256: 11fddbbaeb002de1f7c6ef6a5278ed308603ce5cdd00426e79ff759ea41a1e09
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=best+sad+love+letter+for+him PDF link annotation
    • https://cdn.sqhk.co/bagadogod/haibhc8/memuwemagedupo.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/Jjdgf72/feketezepabo.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/f2gyQJP/3748809554.pdfIn PDF document text
    • https://cdn.sqhk.co/bogijifaviba/rG3vkjd/27877757404.pdfIn PDF document text
    • https://kujazekomoduni.weebly.com/uploads/1/3/5/3/135315250/c2c97f77.pdfIn PDF document text
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/1320734.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/eW107Ec/italian_radio_stations_on_alexa.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/gjjNdhc/13027008582.pdfIn PDF document text
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/741391728d.pdfIn PDF document text
    • http://3gusevshop.website/the_road_back_to_you_an_enneagram_journey_to_self-discovery_freelihi9.pdfIn PDF document text
    • https://cdn.sqhk.co/darojopul/gqb2PPy/90_s_music_radio_stations.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/ihhiigj/kofezesiw.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/cifwtIk/puvepowunidibajumigut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baxirogujugiji.rf.gd/design_portfolio_template.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_off00016908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16908 5256 bytes
SHA-256: 78a6bdab93c3c9f42266cfce0dee66defc622a0294996c7678464f3cfec5ba35
font_01_sfnt_off00017ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AC5 10844 bytes
SHA-256: 104aa5b6c90223c8bacc7d781fa31958f718c22ed1994a0a032b6a5c65054429

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