Malicious PDF — malware analysis report

Static analysis result for SHA-256 84369bbb21db515e…

MALICIOUS

PDF

78.3 KB Created: 2021-09-05 08:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 618997c5fd3b25ce9a73ce2fcad7b93e SHA-1: bee44556aefc21008148c308a0cff61d1a382381 SHA-256: 84369bbb21db515eb5769d06a1d4301025e007eb1e3be6f01837fe37c50c8abb
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious content or redirect users. The presence of multiple unknown URLs hosted on various domains reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f718361f015---23441826945.pdf In PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/9648038901a569efcb77010fde27a0f4/merijasukajarul.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/894a1b083856f6c109aefd970e521886/temixib.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160da204849109---jixunewasalugiguwevejaxid.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/popoxojeki.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8342b57161---zutesirokabegoluz.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/jurekorutifimatorewazenaf.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/su0vpbvftehesmb1sqako5u86u/31038033626.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/59191216607.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/33786158614.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/951276320.pdfIn PDF document text
    • https://energooptima.hu/upload/File/tikenozulumalagage.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/lukisafuke.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a956076964---wipomufubazojototi.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb5b73c623---jifibadif.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/muvogapivitepojada.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/givitirukanuwejekegibipi.pdfIn PDF document text
    • http://toonesk.com/upload/zomekazevikeruxuborivev.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/82353113414.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/52835688662.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fc4a299d65e---2241959468.pdfIn PDF document text
    • https://safe-international.com/userfiles/file/15524290890.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/kisif3lok5enl4uhgtp994ugpl/3741500596.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=triangle+theorem+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18A 16332 bytes
SHA-256: f84513ad4d1a5cfe036c5ed897a47415bfa57c1ccbe563410c3d3198dbf31ff6
font_01_sfnt_off0000fbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAE 10740 bytes
SHA-256: e520d078dc1117d14e14b3532fc9334e54e202f943114527ff489c0d1c0bef0b
font_02_sfnt_off000113e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.