Malicious PDF — malware analysis report

Static analysis result for SHA-256 5493931400e21827…

MALICIOUS

PDF

87.2 KB Created: 2021-08-14 09:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e2c5ddef2a47f4a215bf088f9e9dc519 SHA-1: b98429094d5bd1b06b6399340ef76b5c6b7ede82 SHA-256: 5493931400e21827c68d8b7993fb012ea29e1859a968de4e2899f21d8c7da6f1
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised websites and disposable hosting, characteristic of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest an attempt to lure users to download potentially harmful files or visit malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://timecraftz.com/userfiles/file/45839843624.pdf In PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/zanuzomij.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/771ad74e0f7b058e8e538b25eb706daf/4360265021.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/zudegozuvituponavezu.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/31ac21f879ef14c150fd793ccd4305c3/25119834807.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/34103037498.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/44174971670.pdfIn PDF document text
    • http://cgemfoco.com.br/ckfinder/userfiles/files/xeladijikidikumozela.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62c994c565---wimowubamubasakepir.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/vuveronop.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/f4fb36145477f0e06667a400ce46a232/saluragewasomako.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///91842974003.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/fetunofovubuzepu.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4ca2b6d649---nidawojape.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/32899340131.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/24235245323.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/xutumevale.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bb61528d8bd---zilufimove.pdfIn PDF document text
    • https://onwater.my/uploads/file/93737937301.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af54cea1fef---46953103274.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a26b492c146---85294819328.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d224ae3ccf---62835849142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=download+game+gta+san+andreas+indonesia+pc+gratisPDF link annotation
    • 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_off0000f047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF047 17564 bytes
SHA-256: 34ad2f9015218390503ae181872b53ff032ee960672cb61ee96c117e0a9daac7
font_01_sfnt_off00011d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13593 10944 bytes
SHA-256: 50d328f412b1e786205d84d7c32ad43c6583402ca6aeee709771b7cc32a3c502

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