Malicious PDF — malware analysis report

Static analysis result for SHA-256 074341c9ba5fb4ae…

MALICIOUS

PDF

87.2 KB Created: 2021-07-03 12:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8bfed07e2f80062d56d0e98597c6a934 SHA-1: 9c412d1f2d86bdafa1c2ab82294348fec0007a86 SHA-256: 074341c9ba5fb4aedf9c7c5bd9dd05b380fdeebbb42455f5620e5765f9ea3bf6
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories and other potentially untrustworthy domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/7kgr0psofvp87eu4oir2bki7m5/66593482252.pdf In PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f1fa28b1c---77157129195.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/bivebekimejadabux.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/woviviwowawesilolab.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b759991c9a---80482987670.pdfIn PDF document text
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/lorumokanutakowudamibip.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/jarepe.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/d21a64e54f39917f0f925d41458fa4ec/pilurajinevapifodunadav.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/kozana.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e592d53eee---vijonozusejaxekubev.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/43eafeed4bff2db43ede4728875125ea/libipinixaxaxo.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873dcc4f7b3---31723054198.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5cffafe52---wiwazumefugafuzo.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/72552517822.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/9eb6fee7ee3ce494bb4c33c195ff3224/73666367456.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/lukuwufipanudetizasi.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/ca28e6dc97aaf8b01da9367ef2e8032c/dadiduzon.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/222ce8a9e6a83049e0deef76621272d0/99432526178.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///34971360556.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/famozuwiwofoposutevizora.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/kuwunepinaremisolewavaga.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/18352425909.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/xavidepo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+many+calories+in+a+glass+of+cabPDF 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_off0000f1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A0 10912 bytes
SHA-256: 2abd4e41176ee0208da194b49f52f135d64a8bc74574ef214076474547a3fd2e
font_01_sfnt_off00010aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEB 17272 bytes
SHA-256: be63dacb2ee1cf5c1b5ec92dbc11f612d447cf395aa355de843bbd79ab2a63e0
font_02_sfnt_off00013797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13797 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1