Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2ee73ad0b9dea6…

MALICIOUS

PDF

85.1 KB Created: 2021-09-16 17:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 91602b1fc7ae054613a3572441d0cb98 SHA-1: 1aea931a9b82c99d5ed3cf0346ba34f69168e9f2 SHA-256: 1d2ee73ad0b9dea6f3222d9d72c3e228850578de7a7228c02e9c13db8b22bcb1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users. The file also functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories, suggesting an attempt to distribute further malicious content or phish for information. The presence of embedded JavaScript indicates an intent to execute code within the user's PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161425d98d2fe1---fokakane.pdf In PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gekarelizimafurupariz.pdfIn PDF document text
    • http://xsjsbzrw.com/uploads/files/vasapubipakaminofomene.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/14e605f00a85cddfe2b079d551341e36/rogitazub.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/22003217274.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zefenuwujefovuwubemig.pdfIn PDF document text
    • http://ovstav.cz/app/webroot/files/files/xabuwedo.pdfIn PDF document text
    • https://vietnamairlinescorp.org/js/ckfinder/userfiles/files/namajenenu.pdfIn PDF document text
    • http://leaders-adv.net/userfiles/file/767819305.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder/userfiles/files/30673476367.pdfIn PDF document text
    • https://rentcar888.com/uploads/files/202109012354417221.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/161419e6bb7cee---potuparajagitexazurowawa.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613e35fd7ad44---kelisisodebudiraduge.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/tafuwojuxalu.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16140e4a07d77b---dinizigusafuzalibenu.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133a977c42d7---vigetuvixazudidujodowanu.pdfIn PDF document text
    • http://pooq-design.com/app/webroot/fckfiles/file/mepakevorafatamaguzo.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/banixubogodafativevava.pdfIn PDF document text
    • https://tomaszbizon.tomaszbizon.pl/web/uploads/files/foxozapajitorebasunon.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/remafaginugeturevitokari.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/burelipig.pdfIn PDF document text
    • https://ezokniga.com/uploads/file/dixepumofuw.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/77586341908.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613343e933d44---mozusimegezukulazugovuji.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/webilofetuzubo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=chapter+1+of+the+giver+summaryPDF 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_off0000e6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECF 17784 bytes
SHA-256: b8165bd8392b2ea2fb1fee4dac1cf5aef6273cfd1342f095a8b519c656d716ff
font_02_sfnt_off00012cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD3 11016 bytes
SHA-256: a4bc81e4697ccf8d263d635dc8dda559639a2568561e11641014dae62945e09d

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