Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb7967322c7dd55…

MALICIOUS

PDF

91.3 KB Created: 2021-08-18 05:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 16ea0a08d1e75a39fb2c442edba6ee77 SHA-1: aa0850d1a55fea99912c7df71817c1be1cfc3cc4 SHA-256: bfb7967322c7dd555b239ad2d36ab6e2a3afdd15b6e6e7ff9e0e18cc2f87cf28
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to potentially compromised WordPress sites, suggesting it's part of a link farm used for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb9ca83a3a---wugujukopoxenowe.pdf In PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/vosobuvejox.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/mbp02h0uc7f9olchvl8d2gcn4o/75700126270.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20210719_005601.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/7187998596.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/difovoputozarefewarutaf.pdfIn PDF document text
    • https://jagamimpi.info/contents//files/mabaximipudodeme.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606de27374983---43974579677.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/mamopeteguxonusimebub.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d8def76a319---57021183419.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080ad48e749a---25649595334.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/pb9dm17lmbvp21sq2818fvvqhn/turad.pdfIn PDF document text
    • https://khanikango.in/file/35792021371.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/kazavizibabifo.pdfIn PDF document text
    • http://proxima-design.cz/files/file/12192320180.pdfIn PDF document text
    • http://nusamulticentralestari.com/Uploads/userfiles/files/74546276756.pdfIn PDF document text
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/samavomed.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/97132979510.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/49299545694.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a772cc07a12---35190156084.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/87406248708.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160719e1cbc121---mexawozuzatatibitekomun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=the+french+lieutenant%27s+woman+pdf+free+downloadPDF 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_off0000fdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD5 11068 bytes
SHA-256: aaad3f038db04a793f0daa2bef41c817ac2d187edd9db432080afa38410b6fc1
font_01_sfnt_off00011780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11780 17128 bytes
SHA-256: c7e472c9aaa7b8f6e9dc99d7deddac584a5962ec538d5e048c2971cf5cfd4f91
font_02_sfnt_off00014461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14461 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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