Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbdf956ec92d8ff…

MALICIOUS

PDF

79.3 KB Created: 2021-09-20 12:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d847516eff3c13cf27bece6739615390 SHA-1: fed0ce8cec679dd4d48862db735801f4ab7f5c04 SHA-256: 2fbdf956ec92d8ff02c43109b42b4ce7ca53a914fd964a04faa14f902cf5a9a9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV with a Pdf.Phishing.Trojan detection. It contains a link farm hosted on compromised WordPress sites, suggesting an attempt to direct users to malicious content. The presence of external URIs and a link farm on disposable hosting further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4597

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://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/161324a58ccd9f---nefavakowolakokipumi.pdf In PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/62361161701.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/92683074628.pdfIn PDF document text
    • http://www.moyekolodin.com/files/tarilewuwilax.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/niderezewukuxibupeleza.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161414a294e6d1---wewexiwagisawidapenafufa.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210910032706.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/48086529464.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/natoma.pdfIn PDF document text
    • http://aurastaffing.es/upload/file/depiw.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/bajeratelunulekopeguretaf.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/78306313450.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/27c21ffc22ad85a8b33d9a9e6129036d/25925233056.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/sogojuleposawaf.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/7343061266.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/26031539884.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c490533ee---gorar.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/56235627748.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/radarededodumaguvexazag.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/rawobevadiwiw.pdfIn PDF document text
    • http://dejede.com/userfiles/file/livaweriwiwuzenufal.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/41527004412.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16143b48585950---tupuxelafij.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/96983891628.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=blackberry+password+keeper+app+for+androidPDF 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_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 11000 bytes
SHA-256: e4f2a8e1c9b69ad360341f81d7dd6bd410a6da2361efc594638e5eca4cdcc1e8
font_01_sfnt_off00010fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD4 17928 bytes
SHA-256: 0fbe362733a108e402536cba1b60256fcf9b619400fd761d8fd1113c10a1b6c5

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