Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad45849d8c4d6f44…

MALICIOUS

PDF

86.7 KB Created: 2021-08-12 17:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b2eac15f4171820342f13945a3722daa SHA-1: 3da07506efd7b144bf4283c749834243dd3d5d67 SHA-256: ad45849d8c4d6f4472e7a8dedcf3664fd0f053c3db0155bfd5122bb8a912d81f
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to websites that appear to be compromised CMS uploads or part of a link farm on disposable hosting. While no scripts were extracted, the structure and URL analysis strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8358

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abcc9792d4---33695602457.pdf In PDF document text
    • http://izdo.org/img/userfiles/files/nutorivatisopazakus.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/8adab0761e85145392a8c3f39b12b656/diderenebasovakawinogisi.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/92700856445.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/24253622407.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/41a42b9a4ec0a442bedf72f4b4cacabe/zekejevexitezoje.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/d0ff8e2bdde0cff8982b56407cbb477f/7236116821.pdfIn PDF document text
    • https://le27.fr/docs/file/wumoguzugirekef.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160929f3fab8d3---35448152619.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/34333837576.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ecd421fa7---resowafen.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/48295627833.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/88054207095.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/f53186f34306c4a1409526365d4704bd/zupuwawolajo.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/5800422849.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/6aa3b8620d8f6c790af48330558fcd1a/2011526366.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/59633420516.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160750a5bd3943---6878450288.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c4935e46c---57691613448.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d2be53c6f2e---dopepuzovofija.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/29307767066.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160822eb907b9f---juzowitokibabalinis.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/39e97e4aab034bed7d4d1c421b1cbb25/91304935648.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=aromaterapia+aceites+esenciales+propiedades+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/80685090821.pdfIn 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_off0000faba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABA 10760 bytes
SHA-256: 3be74591ea2f9867cca62f74af0695c81c63f72d4dee90b7b2acded2bab7dcb1
font_01_sfnt_off00011372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11372 17532 bytes
SHA-256: 92f367794da7918efde0b9820f87abcfb45399ceafb80c9d7fae44465210aac2
font_02_sfnt_off00014034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14034 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1