Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3fa18034baa9a08…

MALICIOUS

PDF

102.8 KB Created: 2021-03-23 13:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9ac02152c3b86b1e2b17911cba9599b2 SHA-1: 309f6674f9401a1aa4ffcd4bbcd2489814092656 SHA-256: d3fa18034baa9a082b991f57b966a0f8b1b82a91936a3aece8a21b3d31edcee0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, including a link farm heuristic firing, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate malicious content. The embedded URLs and the document body, which appears to be a garbled representation of search result text, support a phishing or SEO spam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/award?keyword=mastering+the+art+of+french+cooking+pdf+espa%25C3%25B1ol PDF link annotation
    • http://pebifakonek.sportsontheweb.net/55044411396.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366004/normal_5ff7edef2d8ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418175/normal_5fe47e456f0bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_6012fb4c5c5da.pdfIn PDF document text
    • http://rojibitakuvekuw.scienceontheweb.net/38778560791.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/al_quran_bangla_uccharon0egv9.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/2nd_edition_original_dd_character_sheet.pdfIn PDF document text
    • http://cozyplacefor.rest/8340169636834x4s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_6028725da577b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_6017b18322d54.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/muvojugejoxip/walmart_close_to_me_24_hours.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_ce1baa3221474cba9a9c62991c243409.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/streamline_english_connections_free.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/interactive_decision_tree_excel_template.pdfIn PDF document text
    • http://fegoluvarelewum.myartsonline.com/what_do_u_mean_by_human_resource_management.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/pop_art_words_template.pdfIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_c2a6be345ca743bc82766aadbf9cce4d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/95824336328.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/purdue_owl_ama_citation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/lg_v20_screenshot_folder.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/23684796620.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/cpr_guidelines_2015_aha.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_off00014cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CAB 5700 bytes
SHA-256: 66629526390c28d1132f44c4b900c86bef1302c7031a39e0124991ac28c78575
font_01_sfnt_off00015fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FD8 13712 bytes
SHA-256: 063bdf1c6037c549cb801221f6361f95543800549326262f501cea6fd98572ef

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