Malicious PDF — malware analysis report

Static analysis result for SHA-256 849ac888f0dcde86…

MALICIOUS

PDF

77.5 KB Created: 2021-03-12 03:27:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7e5fd816478d5e16bc5a69985d0722b4 SHA-1: 8c24466321fc3a4cbaa483a919f90a18c2bf7b02 SHA-256: 849ac888f0dcde8611efc496c724b88355870d0799143a18bcf794c7a0a86af3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=how+to+solve+transmission+line+problems PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497078/normal_6049c102aa872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494883/normal_602448af423d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413702/normal_6023e70560672.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/hcrldIX/free_music_video_maker_download.pdfIn PDF document text
    • http://wejesigozolireb.getenjoyment.net/lonet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459796/normal_5fcbf2b4ccdd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452853/normal_5fe209b2eabb9.pdfIn PDF document text
    • https://cdn.sqhk.co/felinavaw/Thgzhhq/samsung_data_cable_software_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366993/normal_60064688c1ab8.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/4gDDhef/norse_mythology_names_for_pets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_92fb336b87bb41d593f20feb112361f4.pdf?index=trueIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_1fdd3796d66c489cb49ab771618dbab9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/reading_plus_answers_level_history.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/how_to_write_a_sales_agreement_for_real_estate.pdfIn PDF document text
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_b63e24662ac44a74a947d673ca178dbe.pdf?index=trueIn PDF document text
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_7bac5b9dcf714fd38a45975e751c5aaa.pdf?index=trueIn PDF document text
    • http://jujageritoxo.atwebpages.com/international_law_firms_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/94016083787.pdfIn PDF document text
    • http://peruroz.onlinewebshop.net/words_of_affirmation_love_language_examples.pdfIn PDF document text
    • http://pawepeg.atwebpages.com/arduino_gsm_code.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF231 5216 bytes
SHA-256: 504a6c55318b97c1d20a2dfd2d05a50acbe66a634647a9743981784a2165772f
font_01_sfnt_off000103e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E6 10672 bytes
SHA-256: 5f65ea66ba3e1c1e20878524618529e6e2f69b414468a3a9bdcc3484b77d5ffb

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