Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb1acab43d38313…

MALICIOUS

PDF

69.3 KB Created: 2021-09-04 09:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b035db32dcec9e238b02b60758259a07 SHA-1: db09ef735bb1e1eec69700135438c27ca34a745f SHA-256: 0fb1acab43d383139ddebab0ed2bcc7ed92c2e221287420ee3aa2493a406fec5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed for SEO poisoning or to lure users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6691

Heuristics 5

  • 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
  • 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://powermailer.in/userfiles/file/tupabukugobawilirabo.pdf In PDF document text
    • https://rh-h1tapi-turbo.com/contents//files/27375121988.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/10743494928.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/48533124795.pdfIn PDF document text
    • https://dacola.com/upload/files/buditodomimidotaladusar.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/90266918528.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/a5pmnke7e2mvcvu6db0vamedo2/8675709624.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/20625599125.pdfIn PDF document text
    • http://citra.cl/userfiles/file/lekudujijekexudigo.pdfIn PDF document text
    • http://slhospital.com/upload/fckeditor/file/22451845978.pdfIn PDF document text
    • http://tcyy88.com/userfiles/file/2021083103032873499.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/7c63e07e80c4078efe6a5e7b28b45965/nolup.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160be0f350065b---xizivimomi.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/lolotetoxawiterido.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d778463ca3---zerisigifexuv.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e86d896698---foxoroma.pdfIn PDF document text
    • http://geniuschulatutor.com/userfiles/files/keporipefetisatovaloxo.pdfIn PDF document text
    • https://sca-kc.net/scauserfiles/files/85388137414.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c9760ffab---lofumef.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/5ji0kcq2sdnidevl5nc8tnnmg5/33330709384.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b605414e096---63226233629.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/9slv0s9bhm2cc7tsbq5a5dgn4p/tulipepid.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/202174416322991.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=candida+di%C3%A9ta+k%C3%B6nyv+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5E 10596 bytes
SHA-256: 256dfc9ba9cac56c951bcba628f7e7e33fc1af6186ec65a87c00b6d6a370625f

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