Malicious PDF — malware analysis report

Static analysis result for SHA-256 322adfe91ee67c93…

MALICIOUS

PDF

81.1 KB Created: 2021-09-01 17:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8bc481bf5617e4884f3c00e3502b5aa6 SHA-1: b338888853f986fa1453f0c2494d77ba884711c5 SHA-256: 322adfe91ee67c93705cc748d141c6252fbe70ef1b7a32b1759b773d82ab503d
164 Risk Score

Malware Insights

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

The sample contains embedded JavaScript, which is a common technique for malicious PDFs to redirect users to external sites. Several heuristics indicate the PDF is part of a link farm, likely designed to host or distribute malware or phishing content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8462

Heuristics 7

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://apexhealthnutrition.com/newerac2c/userfiles/file/90792280201.pdf In PDF document text
    • https://sambelteri.com/contents//files/75131902889.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/jijekerubofibutosojik.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/e7c514a8cf76c697fbca7f71f48f05af/22683291973.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612a34d6e2d79---35986143483.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/32556646098.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8c0d951ac8---37246481696.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/noniziwimo.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/bacd1375fbe8a4af98c9b14a096af71c/xafimeruxujuvivorolezope.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945b9fa4512---binulometuke.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607989de5473e---47649469205.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1608649fc29a3c---powam.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///2021060412524_132569947.pdfIn PDF document text
    • http://home-delighted.com/user_img/files/82411646484.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/fanonivowazepebuzej.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9f9fb79e2---xaboxuvijujeza.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6bc35e8242---99889665729.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/guvaroneb.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/30259108503.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/25604559529.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/vejomebutijirabozazexe.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/81286ef98326d6a7c28a0bb0db4d1b85/perufenobefasuzepasike.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/28h14igq2svnhf792lh3ndj66k/10238699725.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/xuwujiwazevekeputijobe.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7e6c511db---4759267755.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=red+pinpoint+dotsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AE 17172 bytes
SHA-256: 65c07ba20ad88afd6850257709739a280bbb89a7173b9cd044687ff4ece373ec
font_01_sfnt_off000115b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCC 10120 bytes
SHA-256: b2ac1c128e52eb60f0868fd5655853ed536f3907dd2a572bd5da91e225dc4e98

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