Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a89e6156c7f64e…

MALICIOUS

PDF

77.6 KB Created: 2021-07-19 09:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 05b3db95ca46a1359465faf81d84b07b SHA-1: fb25da1d8748da461282a31eb717a479f1f8ff19 SHA-256: a2a89e6156c7f64e59a4fc31133a495ce7276cec6b7ce5e71a140c598334238c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous external URIs, many hosted on compromised CMS uploads, reinforces the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6966

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 https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/98ed8842721a9e5333fc9a7aa911976f/10807377412.pdf In PDF document text
    • https://actor-conseil.com/files/file/lametavigetixaxizug.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/86efc85e91aa9327fb588efd1afe4d5a/tanuwitenibuvukowapi.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a4076e0e3---47395088734.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/kosalipozuvavowunut.pdfIn PDF document text
    • http://ohstigers66.com/clients/d/da/da15611725e7ba20b6827cbf2e24f87d/File/vaxolivaxaze.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/xuwagox.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/2283781253.pdfIn PDF document text
    • http://incucinaconalberta.com/userfiles/files/84192175909.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/v7701c1l8bnt9nfhpmfoifguui/korosujezizinopizupoj.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210614_C4DB2FC9081E0551.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/60683620761.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/63666c7e878fb75150120677bc71b3a2/53637218083.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72ea1270a1---64005869896.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071158bcb371---48396923764.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/75284641388.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/mevuvajuguzokepesem.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a6413fc9808---belidodi.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099b494561c9---belumadafexolodema.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/351kak56ribvrstlhu3gcahnn6/pugaxenipusifotilesi.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc7a4e016d2---29504250822.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/34369680377.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=history+of+aerial+photographyPDF 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_off0000ec02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC02 17668 bytes
SHA-256: c66ceeb069d3d941db81cd28123ba2a89de8d7b7e84d1f875cf0410e3bb98c3f
font_01_sfnt_off00011a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A38 10640 bytes
SHA-256: a0f0d22b64bbdbaeb4d4401b74c0bb8ae6abc6b19f37d9945bf75fdc0ff1c4a7

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