Malicious PDF — malware analysis report

Static analysis result for SHA-256 9493c77ccf68e3e1…

MALICIOUS

PDF

103.3 KB Created: 2021-06-27 09:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a6e6f6afac4907a48fc76a785847f0e2 SHA-1: dcce8ad1757ea58e25a3d5cdb1962cb8ca5e9c28 SHA-256: 9493c77ccf68e3e15176fd728ff7e8544850489d3983c27b967537c5457c194a
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to PDF files hosted on compromised WordPress sites and other disposable domains. The presence of multiple links and the use of UTM parameters suggest an attempt at SEO manipulation or distributing malicious content through a network of compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074431e4d9db---zenerudadukam.pdf In PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021061103585973499.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/u21d60tg79hjib655jl10v9aoj/lodolajezavilofawu.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c396951ccab---nijobukorugibubof.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/2513a85f796a4857c600d1fb5bca6248/79008635940.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/47251270545.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050618564673499.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aed2ae0f44b---13233541568.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///xebesigedof.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/69216570562.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16074b6ada5982---zufabevelobadezibeto.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d6fed1omakpii9aoq1qpja3j22/18684842345.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098dd0864068---65032437848.pdfIn PDF document text
    • http://podushka.by/files/files/51514138216.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/c6b0361eb4bb0c81e3ef4f2f5e1a4495/4526943511.pdfIn PDF document text
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/wizoxuginewaja.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/e0df433a2843d800d3cd1e50f6ef87bd/zolotubakorife.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/95258281688.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e9dad88ad---zetafukunitove.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b790f719a4---46664747134.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/s2qhlfqshgk21kage38sfp7ajb/dojigarenaguzoxedefov.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7b6f883c0---nesekobanovus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=controlled+hydrogenation+of+alkynesPDF 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_off00012dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAB 19140 bytes
SHA-256: fbeeedb0b63d207c2db55cd90ffb8d62be7dc88cda683154c819f1489bfc19b1
font_01_sfnt_off00015fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FE0 10872 bytes
SHA-256: 59c9ed852c933cd5ee2c48e453e1daa1adb61f3104293b4dd57f50c453647e19
font_02_sfnt_off000178cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.