Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d7dd9d9be8b563…

MALICIOUS

PDF

93.9 KB Created: 2021-06-28 18:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 47dd387adca4f5d11c30b91d0e23d619 SHA-1: 3ef0dc56a96a64e73a7be50e4b493049d16c4103 SHA-256: 48d7dd9d9be8b563e3075c7fdd9220d221e04d9f049266b8d716649b88efca2c
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082e6f35b180---89003281773.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fff49d388---kogadafudugabem.pdf
    • http://masan315.net/board/imagefile/file/40288189868.pdf
    • http://danielbushreunion.com/clients/41596/File/sekod.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/evo1n3nes7si5njpjjgc5bform/zufasudulaxame.pdf
    • http://strategie-online.net/catalogue_dynamique/file/73963697643.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/5rl8mcldlofclcckohtmulsfh7/52394735431.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/fc2b981800770bae08ec2a194ffe9c1a/gugolopajanalanajif.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/3f4000c0049349ed2d3d5aad0296b7d0/35342990691.pdf
    • http://rgn2u.com/userfiles/files/94288621572.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/1ca66fe891f4551f152d229e6a0a4493/melaxelup.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/cj3613jffhrbtsfcc4589n8d76/3009864558.pdf
    • http://barsugo.com/ckfinder/userfiles/files/kafime.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e8fb0d1b5---66162518752.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/ca9fd92299026921e06dc6ce3ce383b6/88470823686.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16084dcb54dde6---85955508958.pdf
    • http://asustainable.com/global/file/nukukevisusivi.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b59e5781c---49053731561.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095295203e42---gusopoxabevi.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/dc5af933ae8961d32c672727a436c0f6/61310976949.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/0fc52b961294dfeac1524a2243b1597e/xotupelijoja.pdf
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/69670905418.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/2052610a8e7d312fbd418f37b87e5979/55424171553.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+find+free+textbook+pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000f1eb.bin
7a057793925cc44d5a36e2905c56f56930527548020d395bce525f76792664bd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF1EB 18004 bytes
font_01_sfnt_off00010de2.bin
5e1807fa7cc346ef11002a065ef7a96ad6542c1278c677713ef3ae26ec2ed28c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE2 16856 bytes
font_02_sfnt_off000139bd.bin
18f6994602ef054222ee8c8fef18300dabb5e2ba16e47cf9592aa8f2f6aab5ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139BD 10528 bytes
font_03_sfnt_off00015197.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15197 16792 bytes

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