Malicious PDF — malware analysis report

Static analysis result for SHA-256 a86b7900fce43f09…

MALICIOUS

PDF

67.3 KB Created: 2020-12-03 19:12:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d5056cb62d5ee01f3b43e31e4c442a55 SHA-1: e48b8b2d98ee9c9a442c0293262ce380ab36311c SHA-256: a86b7900fce43f09df48a478dc8873f215e439361133cc28c115d25a0b87ba2a
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://trafftec.ru/strik?utm_term=dometic+thermostat+e1+reset PDF link annotation
    • https://xugubevowasisof.weebly.com/uploads/1/3/4/8/134885616/wekotepegaz.pdfIn PDF document text
    • https://ramitafot.weebly.com/uploads/1/3/4/3/134340854/5021265.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e649100c-79b7-4c36-9ae4-e46c0bf25f65/tulevone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f04bf9-ff8a-44b5-8867-f91c92b78a14/livros_de_patologia_geral.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1b86173fb5383b6a81e1/1606294414806/how_to_write_an_autoethnography_proposal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3696f7848ba205d2893e8/t/5fc452875147b14804bcb1a9/1606701703634/madden_nfl_mobile_money_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4754f8c3-2a8a-4349-bd2c-d60c0ee5065c/xabunituzisigawipumi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dc232cf09257bd6bd446/t/5fc5cb9a08845d092453c408/1606798237614/nenasiwos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e0f3f7cf8c75402ad020/t/5fc4411a2dd96f591874addd/1606697263414/55709631765.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d1089955c744b55487a1/t/5fc6c22709f4d56e8f6ee0d5/1606861353046/bricks_breaker_quest_pro_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc563a5a3bf4b14abc71da8/t/5fc60664cb3e0f57711ea9ea/1606813285020/a2_upper_receiver_sights.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc646218ef7301f8b3592d3/t/5fc7436f6beae4543162e7cb/1606894447892/funny_videos_of_dogs_talking.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf90e3485235c868b3646/1606285582781/pamugaxo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1bc75e198d0a3864a8b9/1606228936472/67633896844.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_off0000cb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB20 5056 bytes
SHA-256: 1348bdd464f83809b93fcfc297efc7bae0205259c3cd96576d3eb4b89ad2b62f
font_01_sfnt_off0000dc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2E 10648 bytes
SHA-256: 8386f0c438887cf4b656eba2bd7ccf0e884fa77c1204f36d8f5a9db7cd6f6c7e

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