Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce369af96bbe1e6b…

MALICIOUS

PDF

68.4 KB Created: 2020-12-22 08:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3da687f64236b0838d19f6fd33849d87 SHA-1: 7009461a6acbad132a3de8dc701c1853f7c3929e SHA-256: ce369af96bbe1e6b3f642968f3e6d4daf797b4fc13d8b471e909ca9ca871c91f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or phishing campaign designed to redirect users to potentially harmful websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

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=lobby+hobby+careers PDF link annotation
    • https://xuxefakeni.weebly.com/uploads/1/3/4/2/134234722/bokikapa_wenamanur.pdfIn PDF document text
    • https://nulakumoxuguv.weebly.com/uploads/1/3/1/8/131871970/toxanapatoz.pdfIn PDF document text
    • https://xiworibamenu.weebly.com/uploads/1/3/4/7/134728691/6263955.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/wizedumi/brainstorm_template_google_docs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe009da97599144ebdfd87/1606287518579/64774265012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76946bb1-92a4-4f01-ad29-06ea7604b039/zekuk.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/98214633512.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/wireless_backup_camera_for_car_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5211dec917750a3f31b0b/t/5fd653c7b1c3f31c7a7f3582/1607881671310/talowo.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/jonah_sing_along_songs_and_more_dvd_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a1275e-26c5-4e23-bd37-4818ba9a1ad5/nurekonoralawiremunux.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/mulasofugexugaj.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/hungry_dragon_world_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac698f67-1e44-4880-8bfc-ca3265602186/gadisuvowajofokexozube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c213e15-52bc-421c-b6c5-565a5a645de7/42971365855.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_off0000d00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00D 5036 bytes
SHA-256: 91839c88e3c68f83105a0283818ad0f0ebc2927361c6d5a594f78c5d3023289e
font_01_sfnt_off0000e130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE130 10356 bytes
SHA-256: 073cd147708d6dd54be1527f585b6a89c04e5439623a1d5ba2e59a5f89954d41

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