Malicious PDF — malware analysis report

Static analysis result for SHA-256 e174a83974eb22a5…

MALICIOUS

PDF

76.5 KB Created: 2021-08-08 08:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1e5ec2625521dbb29034571728d2dfb3 SHA-1: 820e8a4dd8bb7a992862f491abe10ec508ccf127 SHA-256: e174a83974eb22a5a656a2b7c98c0a1a55bbe9c11f44f771f62d93210bb748ab
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7568

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1750140df---ripikamijamuji.pdf In PDF document text
    • http://logtech.cz/foto/Image/file/1018187205.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160824d9b0b953---majameravak.pdfIn PDF document text
    • http://vaynhe.com/upload/files/92532498040.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ac297b249---9475866041.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9bb19f1c0---10342008738.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/wolumavijawikigatu.pdfIn PDF document text
    • http://hunting.kg/userfiles/file/21772147863.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/navimokazaje.pdfIn PDF document text
    • https://nasroglobal.com/userfiles/file/mafivuf.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/30881437184.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bee14486087---35188731369.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-7/file/kadapivawujataje.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cf37200e7---19131453471.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/d4cc7a5cbf8d51ad449a05fa92beb2b1/30780432098.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/62703333246.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c91cab0fa---35379579166.pdfIn PDF document text
    • http://kristenpell.com/userfiles/files/gereg.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/puwigonubaw.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/34082247052.pdfIn PDF document text
    • https://noddy.nu/images/file/fifuseru.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/1a0a9ef8e9ab51e6b3a5a2beb348ee05/59045294257.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/xuxuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+improve+supervisor+skillsPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/tuvokemewasafizevaluv.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_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 17036 bytes
SHA-256: e0515c74dd3bb621b056c50286c88737dd64eac01c681411c542ad922fc8cd4d

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