Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7e0a4f71460dc5…

MALICIOUS

PDF

90.9 KB Created: 2021-06-30 23:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d2731ebade808a2627fcee2f0a5a815 SHA-1: b08666c415e01079da218f765185bf1da3c15358 SHA-256: 0e7e0a4f71460dc5f0c621ecb35f3071e342e222d1af1adfe69815535d45490c
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://medvor.ru/uplcv?utm_term=two+people+conversation
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e74e1d7cd---33315225241.pdf
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/dokow.pdf
    • http://susutour.com/userfile/file/32710545133.pdf
    • http://axwelindia.com/uploads/89869876221.pdf
    • http://kmkonsult.cz/userfiles/file/fumikiripaku.pdf
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/telajapuworatozo.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d0e8022b0---29189967163.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4ed1f964a3---48632594751.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b3vdi3dp83mt0jcf6drcgaj2r4/96914090095.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/77874256109.pdf
    • http://forter.vn/hinhanh/file/56640978515.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/5deff27d19da22cb473ee8314cf07c70/fipaxewejaloxifaxikok.pdf
    • https://emmaushuis.org/pages/57662410515.pdf
    • http://goteneplast.se/files/images/file/gumeralavanozubalaxo.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/03beb4c05edac4f6ed7e6c0cc29e5a93/dumagopuvidoxefuguroxuk.pdf
    • http://escuelasfutbol8.com/docs/files/gekirimelaribofugawere.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a011419e24---60336137444.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/6231af0948d6608840eca48938976d16/5061765082.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16094b2041c9b0---ralufajegefomukexokij.pdf
    • http://klasykarozrywki.pl/public/images/fck/file/49263506490.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/6kk1l1f9v7m5mjrb6s57jo4qm4/nirawojidetirixomox.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16081be0d303b6---98447770266.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/8ae69b118874cae910b8160dc0f869c9/7647702179.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010204.bin
ebc99595806a425f8d1a2d38a238c036a7c9b08a8b417027e55656ac66e7dbfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10204 17636 bytes
font_01_sfnt_off00012eab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAB 16792 bytes
font_02_sfnt_off000146c2.bin
54713c9b293d8ab978bf6b74261b88b48f29531e276733eebe24c95e9d5678dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x146C2 10484 bytes