Malicious PDF — malware analysis report

Static analysis result for SHA-256 0405e40080bd52e0…

MALICIOUS

PDF

88.3 KB Created: 2021-07-06 00:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 38c9ce37a0da30bfbd29c28ffbf18696 SHA-1: 5224552e92d4ae24e5b55f2325669c4200cb3450 SHA-256: 0405e40080bd52e021c59de959b0823fe6471ea61e8d1c183da74304f82f448a
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs social engineering tactics, presenting a deceptive download button and a lure for a browser update to trick users into downloading a malicious payload. The presence of multiple external URIs and a high ML classifier score, along with ClamAV detection, strongly indicates malicious intent. The document's structure suggests it is part of a link farm designed to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inwebjor.ru/uplcv?utm_term=baaghi+3+full+movie+download+with+english+subtitles PDF link annotation
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/65319a6c339642843253ddbd23a6f27a/37283576499.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/38942933356.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/k5mlctvhg39f4t23j6qdspi4e5/88256149089.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/728cb3d11d1eff4fea09fbfcd1834d3a/37213222991.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ada04207c41---46012657948.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/62cd79a11ed681988d376a22ed435562/siwitupozewefobaliga.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/80572369143.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfd20903df---sizefuviwowaga.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/66922617885.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af93b4ba7d2---fazagaxon.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/ec8fb9550198eec708a94860d576e6f3/78668170658.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072849625444---mozekimovaxojumovupe.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078df888f87b---zaziliz.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9ee51d9f4f---26639464957.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b95e033eaa---9190255383.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/ea1528beccb04a3a19ba64ea5e77677d/84812727830.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/51657e2cfd392fbafe102888e7597970/juserelax.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160dd749ad248d---tirarudab.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa87da08615---xewogisepomit.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/442bbc5c0e411f3ea74607c495e03bad/30600590516.pdfIn PDF document text
    • http://khochailo.com/upload/ck/files/9428931045.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/48579672319.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_off0000f4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D14 11316 bytes
SHA-256: 67320dda1251b18984be27321ae502d28a1b2d6f3b371235703de2bba25069e3
font_02_sfnt_off0001276c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276C 17084 bytes
SHA-256: 918d61b44cac6bc5d25d68a0bd5dae211b1e8bff3257666d1ba866b0621f6e7f

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