Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e48e73604501e0…

MALICIOUS

PDF

90.3 KB Created: 2021-06-27 21:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 48fc18af5d34a1f961acf5ecc60f594f SHA-1: a9cbc5f25159bd229d0e53f9ad822ad633ed61e3 SHA-256: b7e48e73604501e0da62c423dcd5e1c57fecf18299c8dd5fd34c02312303797f
156 Risk Score

Malware Insights

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

The PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The embedded URLs, such as http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd86c8d6ed---48577987508.pdf, are likely part of this redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://agcslohian.com/userfiles/file/wadolibosuget.pdf
    • https://kuzeyilac.com/resimler/files/56066254109.pdf
    • https://ost-fogging.com/upload/files/jefuzalubokikov.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c746f095db4---solumuzifufewajenezuxike.pdf
    • https://arnetbilgisayar.com/upload/ckfinder/files/dujoniverefitobozelino.pdf
    • http://pensacolahigh1964.com/clients/1/1d/1d652d7f5bd5fd2f3712913460b20393/File/falogetu.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160751bbc1fff9---93366679222.pdf
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/39001345994.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56b9a4cd8a---74601825622.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b00cbeb7b85---8589021549.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/a89383b6f8d595d26155a2f53a3f259e/tutirubemonanajigiru.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608364e2b1424---70697275851.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c342baa6e12---vagojuxamofosadiviro.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/1s0npvb80hpgl3udnmdnholk34/22490805167.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/i867a23rcc6t5glse287lp9rjt/93621468707.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/qv0t6upqhml5kakmoeld36m1mi/modozun.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/kilugmmoo1ek3ssc90nlnop8r3/vesomelanuj.pdf
    • http://kfbi.ru/content/file/nasowipegefef.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd86c8d6ed---48577987508.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9da91496b---65234252066.pdf
    • https://chokysitohang.com/Uploads/userfiles/files/gosajokaxikopufut.pdf
    • http://watthaistuttgart.de/userfiles/file/wisurem.pdf
    • http://ahchala.com/img/file/xudikukazubikamiwos.pdf
    • http://bannermaul.com/userData/board/file/besulogunazenogisibarovuj.pdf
    • http://takemehometomatoes.com/ckfinder/userfiles/files/17393783948.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/c87cd7221ab5717eeacad9ce3d86dc01/28709801408.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=play+mini+militia+on+computer+online+for+free
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcb8.bin
01694891dfe17b8b5c8e2a7786de49e6ca71dcdf440fd8d8ef38e8db47e6909a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB8 17948 bytes
font_01_sfnt_off00012ad0.bin
3eba0e78bde1622ecea87205f66d3fcf8fd6d61f747b77fb8b66a8e0eb83339d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD0 10688 bytes
font_02_sfnt_off00014354.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14354 16792 bytes

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