Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d189eedae8dc59c…

MALICIOUS

PDF

86.2 KB Created: 2021-06-25 22:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 223a527767f5b2df661e442c95e1dbe5 SHA-1: 69f8c37db77decbf4ccaa50d9dc4a4ffe472d336 SHA-256: 9d189eedae8dc59c07c6868d7ccc8b594aca6befcb9ab588baa529a50abb8df7
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that likely lead to malicious content or further infection vectors. The presence of multiple compromised CMS upload links and disposable hosting further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://chcial.ru/uplcv?utm_term=types+of+low+pass+filter
    • http://alliusie.com/userfiles/file/nosuwavigik.pdf
    • https://goldenapp.net/file/zuwodod.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/rte5em6tlj9o0e28v27omp6pj9/baluruno.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16090efb93a593---82133469172.pdf
    • https://alatheir.com/atheirwsfiles/file/711724521.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607726442965f---56180510861.pdf
    • http://reutlinger.pl/userfiles/file/pajon.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/mcigdov9e1675pj9mie86qeqj2/rokirile.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afe00ef9bb---mawikitefawivave.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b0f081ed5---koremonipakobi.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caa6c49d283---16086673901.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/g6hgvntnmif74kin1f94g0q5sb/viwurigixajifebogeba.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/06c0fcbcddea387b82911ab7e724d403/7328271445.pdf
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/wubiwaf.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c41bbc27e0f---vefosepa.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/a2bffd0df779f8615c9b9b696bb9dad4/pevupobega.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/94c1f46bcaeca0166141058f2313f9d2/valevovuxezutegerexonef.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3f9492455---76182406529.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fc125be16---majaj.pdf
    • http://www.hermosabeachbungalows.com/userfiles/files/miwidituwivijarunikifo.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/760c29671f2efa104319de4b04e1e124/penabupoxuwopavu.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/596ffae023d757847721fe25b440df4d/58632272835.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/k5an2m0u5kgo02pciada4r1m7s/83553310127.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9be78a57a---69912424452.pdf
    • http://studiotecnicofrisoli.com/userfiles/files/68427609107.pdf
    • http://fdscience.com/UPFILE/userfiles/files/debugopisebetepuzifedipor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef59.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 16792 bytes
font_01_sfnt_off00010770.bin
2901e082d765a844bd6a96ee428ee90195df518fc3e4a4bed116cec11006a950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10770 10408 bytes
font_02_sfnt_off00011f3c.bin
a7214cd21181f116b232ad17f0dc70d5396a25b123cfa667ca759c55638d0696		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3C 17068 bytes

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