Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac028216b809df92…

MALICIOUS

PDF

76.5 KB Created: 2021-03-18 01:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2d8e764db2ccfec24b65b9f3236b1d9c SHA-1: b15e7c13fd7aa1968bdd046f4ccfc3724ccf950b SHA-256: ac028216b809df92cc10e12c7629cf1024f01d070d19c2ceb4f3e12162056bb6
156 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 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 0.9993

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://druttle.ru/wix?keyword=dayton+gear+motor+manuals PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480584/normal_5ff78b77bcccd.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/bebizenadoj-milul-muwan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_600000010d1e7.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/how_to_make_a_truss_bridge_out_of_paper.pdfIn PDF document text
    • https://peniseguj.weebly.com/uploads/1/3/2/7/132712198/3a356b3.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/comment_apporter_des_modifications_a_un.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/paronamekij.pdfIn PDF document text
    • https://zebomutob.weebly.com/uploads/1/3/2/6/132696512/fiwuvogibedat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424361/normal_604f3d3d0285e.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/xunilukegez/dracaena_marginata_care_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/ignou_bed_online_application_form_2018-_19.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/2098979218.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/49267183009.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/internet_speed_test_ookla_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/50667381604.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/vorugovenamow.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/christmas_open_house_invite_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/delolixuxazasukolibemosen.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/google_image_search_by_size_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/music_notes_wallpaper_s.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/esl_quiz_games.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/jifibaxovibakotuminote.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/hermes_oran_sandals_size_guide.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_off0000ed83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED83 5104 bytes
SHA-256: 57067c33716974cfc79fe2fb9b01b10d790bab9d79568d07514782de2ad4c355
font_01_sfnt_off0000fedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDF 10572 bytes
SHA-256: 3564ee494fd23f1bee4dce721600f3d892f8a162502e2fedea66de6c7f82f34e

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