Malicious PDF — malware analysis report

Static analysis result for SHA-256 93da7609e5819bc8…

MALICIOUS

PDF

77.1 KB Created: 2021-09-03 19:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2b6d3ccc0e1b87057dfa3875ac07a33e SHA-1: df3f61e2493e7940471f4d49873788aa930c4b88 SHA-256: 93da7609e5819bc8f1e9978eaf902f178ce3d0d8f8f6da36d8f7149de58f7068
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ML classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/46u63itpgrk570id59q60r7nak/tinixidajepiropone.pdf In PDF document text
    • http://vinabomi.com/uploads/userfiles/file/vepejezogis.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/1447940829.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/lusimudabunipejomatuwi.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/nuripa.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/32514554061.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16080cb582c0cd---xovifogojopikexi.pdfIn PDF document text
    • http://ildong.org/sa_upload/userfiles/file/20210828025851.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/tiwaxibowigawokep.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/lomewomit.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070329fc78c3---wonawujimudesalun.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/jjtnusmsp6v4pv9lh6noc79m0q/somugedopoxafal.pdfIn PDF document text
    • http://funperm.ru/content/file/puregilesorasovo.pdfIn PDF document text
    • https://medbillings.us/lightspeedweb1/file/20335363388.pdfIn PDF document text
    • https://turasmobilya.com/img/editor/image/file/povex.pdfIn PDF document text
    • http://gibisch.biz/files/files/teditalod.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/9d39b40567044f9c74f20a883238d365/28115525379.pdfIn PDF document text
    • http://namlongprojects.com/images/uploads/files/31220651066.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d613034f041---movadebanuk.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/7btbrtmekct0pt7cmec510750o/gigijazevamaxuvajijuraju.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/78288088003.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18e1742cd7---jidefuzenoraju.pdfIn PDF document text
    • https://rotterdampools.com/contents//files/64668635192.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/puxunokirudusewofamo.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712f583627a---1900478725.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=world+cup+fixtures+uk+times+pdfPDF 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_off0000c7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F4 17856 bytes
SHA-256: 6c6d5ea8bf5e5a9c8009107560598631032810a6bb2ce6fb1a87845d7e42c11a
font_01_sfnt_off0000f5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDD 10804 bytes
SHA-256: c53f7c29c7ba7698f6a9a53d8ee84330107cd3378878a5646f3f5a7fda6de520

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