Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8ddd2d2188feff8…

MALICIOUS

PDF

87.3 KB Created: 2021-09-13 03:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 88d83e55940e665027e41e94c2800b74 SHA-1: 2e18feeec440c9154534020467aaca626587b3f2 SHA-256: b8ddd2d2188feff8244964c351937654bcfdcccfd3336f3a77df1b3112cc6263
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133f2cd6d97b---boxobafok.pdf In PDF document text
    • http://onlineticketreview.com/images/file/fusimagugivirovose.pdfIn PDF document text
    • http://theexplorerthai.com/userfiles/files/11861374019.pdfIn PDF document text
    • http://rjt1.org/upload/files/30852517112.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/xekexofof.pdfIn PDF document text
    • http://philboyd.com/resemig.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/bamepasetaxefuposesegafaj.pdfIn PDF document text
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/xogax.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/88639284252.pdfIn PDF document text
    • https://tedesco.pl/userfiles/file/53459381420.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/53924757794.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/jumosiwivo.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/mifubuwudejitasiwedadapan.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/13680285027.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/rodifivivasovad.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/jesapojokofotovafofifawu.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/59828599815.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45162350602.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/30882373479.pdfIn PDF document text
    • https://value.ae/userfiles/file/15538610124.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/mowarogalaxamutarag.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/puname.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/5b42b4b10a3ed59bc67322048fbf52c0/jimokenigidobexuvujabo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=angular+ui+frameworkPDF 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_off0000f297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF297 17388 bytes
SHA-256: 2f135c7684d94db3eedc432fa0b5097dc59b95ef1cab0cf9f17b4306f77bf0a6
font_01_sfnt_off00011fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA2 10552 bytes
SHA-256: df98eaf5f39762ec03040d99b62ea23b0bc7b750271e268e23a9611cebf3f620
font_02_sfnt_off000137c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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