Malicious PDF — malware analysis report

Static analysis result for SHA-256 954d7fe8c98e7e20…

MALICIOUS

PDF

78.2 KB Created: 2021-09-01 15:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1f68fcf241c115aba0293d742d822ef9 SHA-1: 332699e56118455e31939d24d011bdf5994283bc SHA-256: 954d7fe8c98e7e20a17159666e9cf6c4af232abd75951b0738296e150125b421
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. It functions as a link farm, directing users to numerous external URLs hosted on potentially compromised or disposable domains. The presence of external URIs and link farm indicators suggests an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://wastran.ru/uplcv?utm_term=physical+chemistry+for+the+life+sciences+2nd+edition+solutions+manual PDF link annotation
    • http://dispensapertutti.com/userfiles/files/23627424952.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088f48d75569---pevakipawajitijevot.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210805110245.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/495a7473719399d1f2b279d98c055a3b/vefudikifibopolododoforeb.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/dimamesumagukemerifir.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/5d6c14105a54627c061a8d8b705b3d13/tovif.pdfIn PDF document text
    • http://www.domplit2006.ru/ckfinder/userfiles/files/28755491081.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a314445e16---jowarikin.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16070b261964c8---92435842842.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/27498262297.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/5ee0bg2d688c1m6bh3vniat7h2/faduzatilanaje.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afc6fcf1268---78536013933.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/51111481027.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/99c457fa23be474c89b05c1253d1b735/pulelajedeloj.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b233637c3b---73391596767.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609358dd4da53---49333332223.pdfIn PDF document text
    • https://rcot.org/userfiles/file/luxavabofo.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/36820915020.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/63335430064.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/15002610186.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c9ebb493b---gumojemepipoj.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_off0000cc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9C 11076 bytes
SHA-256: 347fce28dde399c8409cabd0a7b88015b44c30bc9b83c47ce630ff0328ce5550
font_01_sfnt_off0000e652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE652 16704 bytes
SHA-256: 8bcaf40479c30b63dfe6b02d2f16ecec8858708d1744322057b0b5f69109d972
font_02_sfnt_off000111b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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