Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd883a1283f8f50…

MALICIOUS

PDF

82.1 KB Created: 2021-06-28 12:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c6126baad5168a4fff586dcaf21825b6 SHA-1: 32ec9446d7d6782e70baf5a9c508c7e1bfe1ded0 SHA-256: 1cd883a1283f8f508ee5f314d82cd74db59bdf9c960afdb0977c5ecdd98c9745
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or download further malware. The document's structure as a link farm is a common tactic for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0395

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://pensionpoint.cz/userfiles/files/vasejafulumepu.pdf In PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d56b8b197ea---93778534198.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/pajaravuxigemop.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/upaf7q1pu8p41dq2dhdcrct6r1/mirigajiz.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c5144ae0369---povoma.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/kelevozemajatigosizikizu.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/1a394bcccca980273583eb1857c10ef0/kenatoxapif.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/72104390061.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/wivabedetowes.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/xexuwu.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/a3189a2c8c1b3c5f69f8ee356d93f125/lenunavuxalekixipanoses.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c612832a3e4---kogiz.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/bilonev.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160990fbc3c7ce---76980981385.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/83766249043.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/48c1a8ab83d59997046ef39d6151d04a/sifomusibazozurenusot.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/16671646915.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/b1635b4f0726beb1a9be867fa5d23db8/komux.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/75595773129.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/besavet.pdfIn PDF document text
    • https://elektrona.cz/files/file/60881539208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=find+the+radius+of+a+circle+with+arc+lengthPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 18364 bytes
SHA-256: a2cb38342d5e4611ddd066503be26dbf68a3302ab75a5c36e7d16d6939bc2927
font_01_sfnt_off00011341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11341 10916 bytes
SHA-256: 1fcf6816af5d228ad4aeaf1027e671b677a8da4fdbfecb2bac5342feb7b66bf0
font_02_sfnt_off00012c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1