Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b2bc614c7be10e…

MALICIOUS

PDF

80.7 KB Created: 2021-09-09 15:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a02c25ea523ee5f6fd1886392e5b0181 SHA-1: a1b48d47fb068b6861c659e285a16d967fab0a83 SHA-256: e0b2bc614c7be10e4571e3d22fb56e4cdccec0c4ec61676688e933c76fac5172
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • 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.
  • 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://synerhu.ru/uplcv?utm_term=descendants+3+full+movie+online PDF link annotation
    • http://i-tos.com/userData/board/file/sijazajakovigize.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/vidijoxalum.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/tatejuzisof.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/78533731064.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/66187285555.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/41481395768.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/wevijito.pdfIn PDF document text
    • http://candientushinko.com/images/file/zegunojowixe.pdfIn PDF document text
    • https://vr-spagna-20.effievirtual.com/galeria/files/nipufigadatiw.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210908212836.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bitibezu.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/kotaj.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/87375679409.pdfIn PDF document text
    • http://otczenacts.com/media/files/jojefijukarevopawi.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/91358111903.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/14485473311.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133a899e9887---21756340040.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/8315fd777b23743ab5cc9f5540e007da/vobuxoviguxuvobakusuwuxiw.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/13469403611.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/wijefi.pdfIn PDF document text
    • http://ozcetinler.com/userfiles/file/66174833048.pdfIn PDF document text
    • http://www.toptehnik.si/images/18716731708.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/087daf4772e83244caa0a4b58fce904f/70414296128.pdfIn PDF document text
    • http://nuklearmedizin-amro.de/userfiles/file/70181652710.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/37545925046.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/newakesozijodufufufezepo.pdfIn PDF document text
    • 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_off0000d7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD2 17412 bytes
SHA-256: 5a09ea528f5a7cea657c5ea3529fb432bc5926d282f0e6838475e0df1ca3c3fe
font_02_sfnt_off00011c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2B 10876 bytes
SHA-256: f4cf1ce5dc189f000c34939499c9c0aeb37bf5bdc46a5060a3737ea86a371567

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