Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f926755ed22cde1…

MALICIOUS

PDF

52.6 KB Created: 2021-09-27 01:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 03a864088bd640ab0168419e8fd979ea SHA-1: cbba2a5ad9ca9c94532ae09821ea4d61da7f73cd SHA-256: 6f926755ed22cde1d2089ffd0b791070bdd76d772eabb83dddce44dd3d4fb90a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically indicates a non-clustered link farm on disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8880

Heuristics 4

  • 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
  • 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://chcial.ru/uplcv?utm_term=wifi+ip+changer+apk PDF link annotation
    • http://musicpark-live.com/userfiles/file/92959829831.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/ruvorafepasumejiwanixut.pdfIn PDF document text
    • http://visusmarble.com/images_upload/files/fogexad.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/rumarojusakafo.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/34766113699.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/93737143912.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/70864390837.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20219111727141621.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210905122955759.pdfIn PDF document text
    • http://makaroma.fr/upload/file/41043745523.pdfIn PDF document text
    • http://aweibel.com/Photo/file/75914407784.pdfIn PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/ralikefomowamowet.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/7288638323.pdfIn PDF document text
    • https://webdatedepot.com/userfiles/file/fapibuvitomabuxorak.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613d41d041fd1---42995393644.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/14128030698.pdfIn PDF document text
    • https://matraci.info/UserFiles/File/32079335534.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/fowap.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/89025391014.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/76073712288.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/34445121838.pdfIn PDF document text
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/52248684229.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC0F 15440 bytes
SHA-256: 6e69c94a0b5533c3528aa11e7c31197a95de84f5c9a8718b69df770e139a29a5

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