Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f1e33eac50e8bc…

MALICIOUS

PDF

74.2 KB Created: 2020-12-25 15:28:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 563434cd2a820a9356904d78fbffad11 SHA-1: ed3c1d631467ae5031fe5f8fb2f216ef5e7a3855 SHA-256: 09f1e33eac50e8bcd3d044d31d4f2b8b78d66070fa01f5e406c353243143a1ce
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://traffnew.ru/strik?utm_term=mobile+patrol+missouri', is flagged as suspicious and likely serves as a lure. Another URL, 'https://s3.amazonaws.com/jevuxozazebazug/mortal_kombat_emulator_download.pdf', is also present and could be part of the distribution chain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://traffnew.ru/strik?utm_term=mobile+patrol+missouri PDF link annotation
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/65030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_5fd93032357db.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/1007421.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368235/normal_5fe2e95029e8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369333/normal_5fc62a2e06eda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412780/normal_5fa65ad90a62b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413587/normal_5fa8565e1ab4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_5fc083506c851.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/jevuxozazebazug/mortal_kombat_emulator_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/free_event_checklist_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bc03205-e5e5-4522-b339-69ac0e4648d2/xiligusuroza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13b63457-ac4e-4460-8c6e-c97241dff9b9/the_devils_notebook_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/election_results_2019_list.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/tp_command_block_in_minecraft.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/haikyuu_season_4_character_sheets.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_off0000e5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C2 5108 bytes
SHA-256: 10dae42940880e20ad5f512667241785d81dfe13492536526f1816166517d1f7
font_01_sfnt_off0000f70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70E 11228 bytes
SHA-256: 4756c2810f2dc55dd3b675877f6219924f253d336d16a151d0016b8cecd1d123

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