Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97533749855d8f7…

MALICIOUS

PDF

74.2 KB Created: 2021-09-16 12:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 34dd5464ad263739649d7d338c8bae70 SHA-1: 48b90964004a0d7f14fe2dbb11c16913f01a6413 SHA-256: d97533749855d8f712f0973e1803e1fd144d81a60b400500ca0aa0e1bc1331e6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body is heavily obfuscated and appears to be generated content rather than user-readable text, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://rkdestate.com/userfiles/file/susijofekonusaxunepax.pdf In PDF document text
    • http://ourconn.com/userfiles/file/202109141050484176.pdfIn PDF document text
    • https://forumsevens.com/images/file/mokijukitisofili.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/5918380824.pdfIn PDF document text
    • http://cartopack.be/Images/file/tilidawojejotamadutinapo.pdfIn PDF document text
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/53546316270.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/jodirogutoba.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210916_6C32083CA2551502.pdfIn PDF document text
    • https://swiz.eu/files/editor/newujadibebepukuwumelub.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/jofometizo.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/tumas.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/fugoxigenu.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/sonomurat.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/7964337567.pdfIn PDF document text
    • http://motopujcovnateplice.cz/userfiles/file/52232254954.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb90b7b9f3---65419627644.pdfIn PDF document text
    • https://people11people.com/uploads/File/54891040687.pdfIn PDF document text
    • http://rydelko.eu/userfiles/file/borujuruvewefefimaxopubib.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/79982804830.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/wajatubiteranuked.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebe10afd88---72431752903.pdfIn PDF document text
    • http://sieuthibds.net/images/files/87656641084.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/56809916984.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/wufolosefubu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=the+hobbit+putlockerPDF 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_off0000b912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB912 19052 bytes
SHA-256: 23420e1e7cf60583bb627ac5798655845b1966d0f2c706291f2c285d8e08310d
font_01_sfnt_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 10332 bytes
SHA-256: ce10c7abe593e828919e646ea6e83d8ddd86a7c380679f0872907ba2bdbe4fc5
font_02_sfnt_off000101db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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