Malicious PDF — malware analysis report

Static analysis result for SHA-256 32453ef9e82f207a…

MALICIOUS

PDF

73.4 KB Created: 2021-01-01 00:03:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c808088312efd8176c6dfa8316dbda7b SHA-1: 579daadcc868a9aa73a7647da650d5192eb57849 SHA-256: 32453ef9e82f207acc01c7647c8b9a9e1b73381099bb3fdca372cbd1f9ccdb3b
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 0.9998

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://traffnew.ru/123?utm_term=flow+weighted+average+calculation PDF link annotation
    • https://cdn.sqhk.co/perigupa/gWiejcj/15608754730.pdfIn PDF document text
    • https://dugeditukuvil.weebly.com/uploads/1/3/4/7/134723955/1231106.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/igX5Y0a/wallpaper_emoji_ios.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451212/normal_5fcf0b9deb6e8.pdfIn PDF document text
    • https://rawesare.weebly.com/uploads/1/3/3/9/133997405/digopuze.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/vowuj_wiwaf_wubitenikutasuz.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/ieih0Nh/58053725125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382784/normal_5f957570adaaf.pdfIn PDF document text
    • https://ruparowix.weebly.com/uploads/1/3/4/3/134350000/088ce384.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/fejakixoweka/zte_zmax_2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/gotengo_model_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/ocean_animal_worksheets_preschool.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/email_html_template_code.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/mafolefi.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_off0000e080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE080 5128 bytes
SHA-256: 3a7b1bbaffb39e213a9992c6d2ab5bc14bd8228181ca8e037e799483b94bf102
font_01_sfnt_off0000f209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF209 11228 bytes
SHA-256: 00cfcc269ba6b0f76c887bcbd1255dadc54e94beb86d4b91b9d6103782edcc29

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