Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0a2746e94ca401…

MALICIOUS

PDF

77.5 KB Created: 2021-04-09 23:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ec72319f044e7f3c0ae6e2bf003a804c SHA-1: 165dab330957af5195952d785638299d4595ab79 SHA-256: fa0a2746e94ca401392c67dcfe630dc81660ada7a43a366c065b5edbc9ff65c0
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-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://gimoguvi.ru/strik?utm_term=when+to+capitalise+job+titles+australia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402933/normal_604655b041a0f.pdfIn PDF document text
    • http://kowuterada.mygamesonline.org/l_encyclopdie_du_tricot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387716/normal_5fe1c8c9b2d6b.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/loraru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_5fc7184c4777d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_9dbf7ea7fb7c4f22ab46b54609bf3166.pdf?index=trueIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_5dbffc39e3c24c959b0c194990804b09.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bogijexu/pdf_viewer_plus_se_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/investor_pitch_deck_keynote_template.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_199369cf3fae45a2a80fa5a138f0ab17.pdf?index=trueIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_940fac8e148c4ea0aa19bd585da19d2b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/vetujaju.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/vemonevoripa.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/votikexalifakuravudixif.pdfIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_73eff60b69c24e1180a95c39553c0c1f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juvetaso/19367370135.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/fuvabefikafa.pdfIn PDF document text
    • http://wurebosuloxu.myartsonline.com/isometric_dot_sheet_a4_size.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_f5170b4593bc42298813d72438effade.pdf?index=trueIn 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_off0000ef55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF55 5248 bytes
SHA-256: c72ab23125f6cb4fa0e6e7516702a2db42d60a1c0d2747dc2a89d71fed9a2113
font_01_sfnt_off00010138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10138 11204 bytes
SHA-256: 1ca642dae81414d2c96088464ee245b5b7d7e4129f516cacb15fee408167e193

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