Malicious PDF — malware analysis report

Static analysis result for SHA-256 df835a0678a9177e…

MALICIOUS

PDF

74.9 KB Created: 2021-08-04 00:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7542f742a6567e297de836bdf52f24cc SHA-1: aeafbcf525197b1e37f181fd6391638fdb708672 SHA-256: df835a0678a9177ec84fd8361f2864a843e9cabb581cb0453f2c02dc6c819722
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware delivery mechanism. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8891

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/goxifazug.pdf In PDF document text
    • https://rintrans.com/files/ninat.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/42659755398.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/bosogaxuwawanozulaponupoj.pdfIn PDF document text
    • http://dzbnf.com/upload/file///57955688203.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/270102592196.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b9d2129cc---48488441675.pdfIn PDF document text
    • https://isosklo.cz/uploads/9563319415.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160fe65c7a3167---wajoxowufakenosu.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607699082cbf9---7466834589.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/dokibibadevugu.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/tighvc8k2o41p3pp3k1nefhjts/nomefegatudava.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/lutevabati.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071950513799---95125131290.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/rovawuzobifevovux.pdfIn PDF document text
    • http://ahoba85.com/clients/2/26/26d353b61ac95a99d7df5001a3d58300/File/kezapenelifetipaborebite.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/xabazizarivexelaxubig.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/wesinawatajubex.pdfIn PDF document text
    • http://iccarrentals.com/files/file/tufano.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160856e67a8cc5---jetisalitazarisopoxoz.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/0bf08ab457ac0716633e213a9fc25432/jizejesoj.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/ns5e60cnejp2kqmcfgebbb6ofk/3129367843.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160abcbd268ad9---53106041324.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021052207213070554.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+tub+clean+midea+washing+machinePDF link annotation
    • 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_off0000f9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D5 11032 bytes
SHA-256: af931a5687c9441d789b9a459076aa5bca78213cd39b5e99a27f285fdf0b5130