Malicious PDF — malware analysis report

Static analysis result for SHA-256 e228eceece81edea…

MALICIOUS

PDF

74.8 KB Created: 2021-09-27 00:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d22d07203f81ea5a2531952ead9d7ce5 SHA-1: 82ac3dac562b1a6820d7346aa41f03c63e9abcec SHA-256: e228eceece81edea5ef7a3a2d0a01a358264c602d8b878d7e7c0d3a8db1de110
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://thewesternmist.com/userfiles/file/mezetazoxewiraf.pdf In PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/es5nilgfapbaqaeag6jp4kfdqe/97470364384.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161397ef877b52---xevusagugagugelu.pdfIn PDF document text
    • http://minerva-collection.net/files/files/91501399838.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/wujasag.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/dupogeket.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/69246730505.pdfIn PDF document text
    • https://saglamahsapkutu.com/img/editor/image/file/vebewitovap.pdfIn PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/nofugozu.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/vumex.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614e77755c429---9678381319.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d299603ad5---40825802172.pdfIn PDF document text
    • http://clanlogging.com/userfiles/file/23910670122.pdfIn PDF document text
    • https://novitas.ro/files/ladadatepizokakaxopofanar.pdfIn PDF document text
    • http://stroyvodservice.ru/upload/File/49747898108.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/vumejo.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/puxojujejazose.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/79384463912.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/nopekexa.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/74347633238.pdfIn PDF document text
    • https://kapefashion.com/files/files/14882125826.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/tatufawuwowofamatavopufi.pdfIn PDF document text
    • http://groupelamiri.com/uploads/FCK_files/file/nikisejabogesuboze.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/6412868233.pdfIn PDF document text
    • https://eminentland.com/admin/userfiles/files/77479363394.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/71149164119.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=recover+snapchat+photos+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000bd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9F 18464 bytes
SHA-256: 5b62873dfaac028b1b296603cf8a5752ba6781db229638278cb8652aace8b6b8
font_01_sfnt_off0000ed2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2D 10676 bytes
SHA-256: e2e24329231ba26424f708578a1d8b37f18c889c927dbf495816cf2f5b5a728a
font_02_sfnt_off000105a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1