Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c5bdd46f9e639e…

MALICIOUS

PDF

86.0 KB Created: 2021-06-25 19:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8abf86951cf835250c907b6979c42523 SHA-1: da2da6ea40fec00c3a764c8bcb61c57413d3d974 SHA-256: 59c5bdd46f9e639e0da5b1dec01a2f9cb3d475950c6879b634ea3ff29475a679
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites hosted on potentially compromised CMS platforms. The presence of numerous unknown URLs suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cbb583da1---64328467126.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/479n82d6aq6c9s7ujb6bkstl1p/97381451201.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609272586400a---fupinokune.pdf
    • https://ludifrance.fr/userfiles/file/nuxufazegixav.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/cefina10cstjajf0bm6jtqf1ls/82749474985.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a74c1f07c---63885117823.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/v5fs6mqei0iq8f8m93cjg2390h/5586309648.pdf
    • https://prawobrzeze.info/userfiles/file/61941444835.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/aa2c4ffcd28f8f728a35a7eedc568cae/rodotaposedewajo.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701209205e7---sugegotowowobizobe.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/7e25de9e15265976f8cc44cfb01489b2/bemitugaxekojixu.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/tm9p7ttrj1bsfs00uq3tg92n33/lubapagifufusabebez.pdf
    • http://birnagarcollege.in/userfiles/file/kumojetelopader.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/eig2punpvc14rv16e89s8ptne4/ninugafagaga.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e8f5f185a---fazeviguno.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608404cba34fd---kavemasodozometar.pdf
    • http://bpabv.nl/uploadfiles/file/bejolun.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db99becd78---ruxudazuvoju.pdf
    • http://szentistvanpatika.hu/upload/file/xijovesezivej.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e1670de60---2654544096.pdf
    • http://architettotamborra.eu/userfiles/files/37651865962.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08ed50e15e---78439309301.pdf
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/musiradej.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=three+research+methods+in+psychology
    • 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_off0000ec21.bin
1c710169d968acd44a54e56816b381a609d1bd491eb795cd01f406a9f76fe6e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC21 16788 bytes
font_01_sfnt_off000117ae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117AE 16792 bytes
font_02_sfnt_off00012fc5.bin
7c2251d7b61763f0f89da4b47359dcc1aa308d3585faa5ad067875152e7cef21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC5 11036 bytes

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