Malicious PDF — malware analysis report

Static analysis result for SHA-256 70932ffa1cbbca7b…

MALICIOUS

PDF

88.0 KB Created: 2021-09-03 16:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0c51bdbb9766edafc7dfb5370b0e96b9 SHA-1: a373b1144ee91989008ede11442a7a7c93a2a230 SHA-256: 70932ffa1cbbca7ba804a067cee594a3d37f685b082412812943cb3338f30a76
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059 Command and Scripting Interpreter

The PDF document contains numerous links to external websites, many of which appear to be compromised or disposable hosting. A critical heuristic indicates a 'Clipboard command execution lure', suggesting the document instructs users to copy and paste content into a shell. This, combined with ML classification and ClamAV detection, strongly points to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://nomylo.ru/uplcv?utm_term=cisco+vtp+tutorial+pdf PDF link annotation
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/glqeplue9lmk52o29v28lvj945/70686851627.pdfIn PDF document text
    • http://longthinhphat.net/uploads/files/7900992557.pdfIn PDF document text
    • https://onlinendttraining.net/files/dujisukozupedukofiwa.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/wofezumiwanuruwotewes.pdfIn PDF document text
    • https://ingatlansos.hu/images/userfiles/file/pixureremitimobo.pdfIn PDF document text
    • http://rayer.cn/d/files/vepotoxetazamamawebe.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d23c2a0b79e---xozamuferozigizimigofoko.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/lawowimazafutakasonawo.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/08/files/210801185103.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/suzusapede.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f48782aadf---gudiwupidiv.pdfIn PDF document text
    • https://designclarf.it/file/furulabogutozo.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/44a204dd153eda0f7e9b027a673db512/78959491282.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/tadalomumixedipas.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/5d17e550866e4b21762b13c214f2e41c/wifivoxa.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/71509361331.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/8772443576.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0f83e59a4---62005369221.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/tevebafigaginejotiwovu.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/61101076706.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/bipilitoruw.pdfIn PDF document text
    • http://omni-links.com/images/blog//file/zugalijefojob.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/47707785603.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/91608267457.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/31216410921.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/jubox.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/41481198598.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_off0000ef6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001077f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077F 19568 bytes
SHA-256: 8e660b6366d8d094343951ebc18eb001b8820f4e8c8f5ca463c09c334079a4d3
font_02_sfnt_off00013a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A63 10576 bytes
SHA-256: e196ed4205e2a49d6d594eab2d5ca7e9ac69bc029a9851685c5aa773d048f998

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