Malicious PDF — malware analysis report

Static analysis result for SHA-256 078ceeb964ddb881…

MALICIOUS

PDF

73.4 KB Created: 2021-10-17 17:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5fbeecb721b649560ad379fe01ff6d8f SHA-1: 00977804f5f06ce040e4eada0129a58f8437db28 SHA-256: 078ceeb964ddb881e813c3376961d3b5c7a8147acb528afc21c11bc66315e84c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, several of which are identified as compromised WordPress upload storage or disposable hosting. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6738

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://massarentearchitettura.com/userfiles/files/52107645098.pdf In PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/7lb69bj9josna8uteuk6cm495g/lenaluxovuxibetup.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/zexopatubogekezuj.pdfIn PDF document text
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/19489507486.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/58743680219.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/9icaude3ilq2ool6gonm797m14/gekibepufepo.pdfIn PDF document text
    • http://sweed-trans.eu/ckfinder/userfiles/files/garimapegik.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/161428889ef101---26958521111.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/zebolefakax.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16142a7656a7e4---manosip.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/87116313849.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/20889319204.pdfIn PDF document text
    • https://theptaynam.vn/upload/files/pariruwelabegevadutif.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/xafafodiso.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/gikopazidudiwefapi.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/dupefumemosadoxujil.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/xubenal.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/35408300408.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d044ee9f06---88778149181.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/nd4ue6nr2l518clt76ttd9vg2u/32152835914.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/dokozobin.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/7xhmvLXWVJc/uplcv?utm_term=increased+peristalsis+of+the+bowel+results+inPDF 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_off0000d305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD305 10996 bytes
SHA-256: f0360d73aadf74a405716c0ff8a17f6a30c2dc85fd1afb30684a617c6e9381cb
font_01_sfnt_off0000ec4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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