Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c32ed03983bdf4c…

MALICIOUS

PDF

83.2 KB Created: 2021-08-23 13:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 57901819e5d780e0abe6ef7a184d110e SHA-1: 32312e52c90bb817c5b425d99c775795075461a2 SHA-256: 2c32ed03983bdf4cea871b7b96bf83aed10ff1afa69b1705e6422cad63c11f2e
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised or disposable. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://unionzglobal.com/ckupload/files/bovaluwekizevuzubidujak.pdf In PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/tilosogogetefexub.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/benotimaxinaval.pdfIn PDF document text
    • http://shs1977reunion.com/clients/41590/File/tuzubogolerokid.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/riwipogeworazel.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/f769d9501aa5696c12a4cf0feee50653/litijamezoj.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611d58af7c201---54307917587.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/q4bp5t0u2tq67adj9htjh09vqc/37373098904.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e52512e5dd---dezitaxixunafejakize.pdfIn PDF document text
    • http://thienanglass.vn/upload/files/rakasevitag.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/sijuseve.pdfIn PDF document text
    • http://tulsamemorialclassof71.com/clients/84987/File/17111095635.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16070a4b36bae9---seliwokofizudimij.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f839764d9---devinaweniwenofufiwexobe.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/2c75fcc45c20804fd068040d4cf9deaa/14371324260.pdfIn PDF document text
    • http://razzledazzleevents.in/userfiles/file/91425996284.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/50811672537.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f008f6abb5---83130029470.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/maviropazopavenezaw.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962de39e7da---kimigimosonopi.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/cm4hr7u6a3909042bts9hamfj5/96065360256.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/bagenujujevomijo.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/65800361052.pdfIn PDF document text
    • http://epmachine.ru/d/files/75398300761.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+put+a+campfire+out+in+minecraftPDF 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_off0000e1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FF 16780 bytes
SHA-256: 42cdef74573f2e58626f1163a6d55271ef5c69467f6047fe3a1fdb74827bf8b9
font_01_sfnt_off00010dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DA 10604 bytes
SHA-256: 822f37350aa2f120a422c390d20d791d1ab1d3a2ad726fff2fbef2113f6a233f

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