Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e9dbfb17b79dc46…

MALICIOUS

PDF

88.5 KB Created: 2021-08-22 07:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 29d76de8b1e6825b8906923653406194 SHA-1: 0d694ba1007dcbdff355e2c5b9d6741e60de03d5 SHA-256: 3e9dbfb17b79dc4639112297e8af6ae2d19018e9972adeaab4c4cfbcb396a2c2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate that the document is likely intended to redirect users to malicious content hosted on these compromised 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
  • 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://krisoc.ru/uplcv?utm_term=craftsman+25cc+gas+trimmer+parts+manual PDF link annotation
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/e844d6b851e75a023599d9ba3cb415ab/68969582903.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49e156a050---devalanovalaga.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/87091122223.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/kopinovib.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/9258598fc5810a4458ee331d1459961d/34463414567.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606dfafe6d7c6---xofafokititel.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/32768099705.pdfIn PDF document text
    • https://sanidom.pl/img/file/mejagulutesonepinokagob.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/eeb7ff8742420a224fb78667228b04f7/52131600460.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/643045a4eba5b9ada9bdf9dd1ac9a8ba/37821724240.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/06cee95aa930427a0eb78e0dafa72132/nubegivaw.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/22526051313.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/ff244075f8f1c3e104ff6f70b21f68b6/diradadilolunumovim.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/abptqkmbvimgr8ga2da67bu0r1/32705882060.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/gixene.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/qng4uqm1avgmoe5nb6imhk62u3/3731855969.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/j5uejcc7l3vb6445rjjv8hu7m4/56035940858.pdfIn PDF document text
    • https://aicsmindia.org/ckfinder/userfiles/files/niwibakuxew.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/70978859558.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/3064e540e4ac48347cf1029f1815c8b9/fesodogaxo.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a933029abf8---35319990348.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d950bdc0a4---15289242219.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a15129467c9---12285722239.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_off0000f152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF152 18444 bytes
SHA-256: e4c5815e50e786363ef528f1f1223fa42a05de7a3b3ab04ee19c7ef32fc7d9c8
font_01_sfnt_off00012270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12270 11088 bytes
SHA-256: cbab45a854c9177887c28ba73cc37a97cb05ac83301ad16ab427b95ac66b5053
font_02_sfnt_off00013c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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