Malicious PDF — malware analysis report

Static analysis result for SHA-256 0068aefe1dc32393…

MALICIOUS

PDF

70.4 KB Created: 2021-09-29 07:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5b734947c666b80a9966e5c827ae2cda SHA-1: 44bcd81ee04377ab087f602cf7b8015c37cf036d SHA-256: 0068aefe1dc32393ca5eebe83019f8690eb72ee8f9857a7ea7e464d8e58170a0
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for executing malicious actions within documents. The heuristics indicate the PDF acts as a link farm, directing users to various compromised or disposable hosting sites, likely to host phishing content or further malware. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://pezenasenchantee.fr/userfiles/file/59144524820.pdf In PDF document text
    • http://theheavent.com/userfiles/files/53026168800.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/pusimugikufedajibimuto.pdfIn PDF document text
    • http://plenaseguroseprevidencia.com/fotosempresa/files/21313205355.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1613266001e228---15341370536.pdfIn PDF document text
    • https://studioconcept-stand.com/fck_userfiles/file/96485233599.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/gujeputokojejavek.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/94444417531.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/lazaxapesefak.pdfIn PDF document text
    • https://ms2oke.com/contents/files/40273115905.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/92633164728.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/89567236902.pdfIn PDF document text
    • https://tessuno.com/upload/files/61336ee0b9da3.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/gajimozitaxupavupes.pdfIn PDF document text
    • http://peetersinstallatietechniek.nl/upload/files/ruranowutikefalel.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/92374206953.pdfIn PDF document text
    • http://moscowfashion.net/content/xuploadimages/file/27717750360.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16144fe6f9fbe0---64703991830.pdfIn PDF document text
    • http://tagsu.com/attachments/fckattachments/file/bavoliwelijijadined.pdfIn PDF document text
    • http://daiichigroup.net/uploads/news_file/ziduvodidanirunerazaro.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/iddcr3u9lqtnl52uise92e88k1/95549575575.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/9lr4ejtpl1d2ot9hhv0usi25vt/zejijufobomufibik.pdfIn PDF document text
    • http://edilcfcostruzioni.com/userfiles/files/kutavi.pdfIn PDF document text
    • http://vtaky.sk/media/file/89251976339.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/161363f09da6c5---guxaxowazojelewewo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=plusmein+free+likesPDF 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_off0000b3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFC 16172 bytes
SHA-256: eb94cee2164307de830038f5579d478f6752cdb6ab2bf2a6b4cbb3a2088ad1e5
font_02_sfnt_off0000f522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF522 10188 bytes
SHA-256: 85569270fea77f5601927d7aed1e8aecbbce00c3c479f5a95e4ea8f27212de00