Malicious PDF — malware analysis report

Static analysis result for SHA-256 c317b1cf874b3b64…

MALICIOUS

PDF

70.9 KB Created: 2021-09-14 02:38:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 121c650896007160cbcb3ba875bc56d6 SHA-1: 15c76288b5dd26480b77f2afc7ad40323ad97346 SHA-256: c317b1cf874b3b64bbf62aff0d090166b24935c52bb656ea4cad917eadea0fa2
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains or compromised WordPress sites, indicating a link farm designed to redirect users. The presence of PRC/3D content and ML classification further support its malicious nature. The ClamAV detection confirms it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6994

Heuristics 7

  • PRC/3D content in PDF high CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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
  • 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://cityface.cz/res/file/tuvepuwamedamijejewet.pdf In PDF document text
    • https://rijst.nu/userfiles/file/fakowejopagasa.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/tiligedawez.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/88f1c9e27ab33e16e13b1f8875711104/88680834545.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/metitemajufaxizonimevuguv.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/pizasupivogelojew.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/denumozakinajedotu.pdfIn PDF document text
    • http://360global.ca/userfiles/file/69385902406.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/22270700887.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/kadisomativogevawubizubij.pdfIn PDF document text
    • http://gongin.humenia.com/upload/userfiles/2021/09/files/210913083048.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/96eb30545bd51477bacf7f23cd04042e/91124617355.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/69610639578.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/5160993218.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/72360714086.pdfIn PDF document text
    • https://aqualibramontois.be/fckdownload/file/21731224362.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/xibavinurewopugarasoda.pdfIn PDF document text
    • http://tienphat.vn/imagesflashupload/file/60730082139.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/diwetixobazopame.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/39301307768.pdfIn PDF document text
    • https://koparieshorvathbusz.hu/files/file/42511719503.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/7c33d1dd584c8e892a3f39e73bf792d2/97470330108.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/zopidaxasefopibijofubisef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=story+robert+mckee+pdf+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0C 18684 bytes
SHA-256: 714a7ed71e126978a7bd8f476894f2fc2b6bc5241ec4ea6a0db260e2c50cb0b8

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