Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec204ea573208044…

MALICIOUS

PDF

62.3 KB Created: 2021-08-14 21:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7c1e7db6508054d5b7c0fb4ecb3ac308 SHA-1: b4f43dce54ddecc946035aee907601ff0d632d42 SHA-256: ec204ea573208044a2111600d6b440126514fffd3890e1f2730d13d142fa505a
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9121

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://php-lounge.de/userfiles/file/fobinawesesafatagebe.pdf In PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ada8e54a9b6---girilami.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/vuranomikizoxo.pdfIn PDF document text
    • http://giaoducvietnamtv.com/images/ckeditor/files/vodejeveruz.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/95072159915.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608232e11c862---46117774753.pdfIn PDF document text
    • http://spoilersmensgolfclub.com/clients/865201/File/70815947628.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081816a8eec4---76640268365.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/zolovobireferenepa.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080dbe7c05d0---dagesitumitonigedone.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/3999196d748c6f2e92eed702bc51c4cc/53391879898.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/vunawovovokenumitufinekik.pdfIn PDF document text
    • http://ezstreetautosales.com/clients/876244/File/kibubidatisanakejekote.pdfIn PDF document text
    • http://saga.diamonds/uploads/ckfinder/files/14497864706.pdfIn PDF document text
    • http://erdbau-rauch.at/wexutudekixuken.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609db55aefa54---felepeliworuzujosot.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/5315dcce1e60e53f4984cefa2ce3a23c/87609619690.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/6e02f732a26e0d9fd3d61aa532e2c5aa/gatobarenojibusaxodo.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/54761561404.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/jofuxe.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073a0d34a879---4580040377.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/97400406331.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/xofomepateziwedod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+adjust+old+singer+sewing+machinePDF link annotation
    • 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_off0000c840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC840 15456 bytes
SHA-256: bcfc272cf7d25394d9609beccf1f78117c9e82ff6b29bd8bd83ad1c48005d24c

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