Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1ef24f2d033f76…

MALICIOUS

PDF

85.8 KB Created: 2021-06-27 10:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 706042cd03865a53ccacb763a8c4bcf3 SHA-1: 3d8c28f78bf684d9c0ccfeff4bae96e942248d69 SHA-256: 0b1ef24f2d033f76209d50ab1effc04253cb05292c39a17d756716ad628677bd
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a link farm pointing to numerous compromised websites and disposable hosting, designed to redirect users to malicious content. The presence of external URIs and a high number of distinct hosts suggests an effort to obscure the ultimate destination of the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/mivito.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e84dc6d603---64284786048.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1524f6829f---11867707006.pdf
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/
    • http://angelojrobles.com/admin_initial_test/userfiles/file/gilawul.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46936166d8---lewidusadiminunor.pdf
    • http://pngroup.pl/ckfinder/userfiles/files/19114316131.pdf
    • https://xanbiente.de/userfiles/file/67758034182.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16095c89f97635---12925211144.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/3fuakf0bths6o7lj6ia2m3o232/17114337306.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/eeqdbkmj63oo929mtpt8vbvtf7/47410558989.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/abebbc63714ba62369b00970bb97b5b6/jowuvom.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/hve3vlh0opgr51g5ogf519tp16/botexivikeve.pdf
    • https://rozgarnetwork.com/ckfinder/userfiles/files/gadisas.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1fceab23b---vulasorobijaxo.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1606d36436df15---sipofoworoz.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/7f47e453ef58dc0fe4b7fa353020e7fe/regeni.pdf
    • http://fobas.cz/userfiles/file/japixiji.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/r9opcap1elvbtqus2n7kb3t3eu/tugana.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/a5f7e91af0e0b2ac3231977511bd624b/burodetok.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd6211b17c---juvovawugisurikale.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/311eb2354859194a8512713f4b798289/sifexosibali.pdf
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/46469712514.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/k9cc140rqq1vs9qgj6qreg6j7j/donopibulerigetepoko.pdf
    • https://anyimaker.com/upload/users/files/vatomobawebedubuluvugize.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=theme+tune+to+up
    • 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_off0000efd9.bin
f00d819d2b15d250ae678e500a50c9035a594282d72ca1193995341eba2ebbd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD9 10012 bytes
font_01_sfnt_off000105e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105E2 16792 bytes
font_02_sfnt_off00011df4.bin
dabecc6e5aa90e8ed70b14e2a0dff45fa82f39ee7c0a84ad5f44a4b18f3dd498		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF4 16964 bytes

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