Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e577483d00146c…

MALICIOUS

PDF

79.0 KB Created: 2021-08-10 06:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 212bf8ae23651f0f11538e7a42ac9d50 SHA-1: fe49eb66b3de327ec43c7d598f34bb3edeadac67 SHA-256: 49e577483d00146c600bcc708e0ef081db1b4a2addb9e7f413e1c07ec74871b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, suggesting a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8389

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://austria-ex.com/images/blog//file/23141758381.pdf In PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877b2e70c6f---18708696801.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/jemesavozex.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/jixugazego.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2375c4fa76f5c4d60831539fe7cd2a21/94423881213.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609285050ecd3---tojefukobirumefijosi.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a63fa0ecd3d---tonitugufigonorawifujatix.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a628b462d5d---61093722851.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec1ad7ce3b---pujotedurozufa.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/getowavugitotefimeruxi.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/4f0b59cf70d74ed8890f8a62047dada5/2641173829.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/lujenogofirazojebaf.pdfIn PDF document text
    • https://air-separation-supplier.com/d/files/90318586990.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c5bfd3528---91569785362.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/6c7ad7bdafca077bf579310e09110e78/zamifipinaxixiluna.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766ebcc8fcd---79287163995.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/15294824019.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/90730138185.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/zuzulizesikixupepenibo.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///zonigulera.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021080713185573499.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/vifinijamekefa.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/soxuxilataferexuzumepulu.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/d08hvhe0k3odc3n28vf07aqgb6/lutunidabeginajalezew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=g%C3%BCnl%C3%BCk+ders+%C3%A7al%C4%B1%C5%9Fma+program%C4%B1+excelPDF link annotation
    • 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_off0000d1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E4 20568 bytes
SHA-256: 505408f6ef97442d09eecf7af74bef2f53ab9ed9d8ce8425297a0aaa69505d7e
font_01_sfnt_off000104de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DE 11576 bytes
SHA-256: cdf76574af4f9ed8a3766fab81d089d79f10f8dca9c589511c36f2e4a977432c
font_02_sfnt_off00011f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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