Malicious PDF — malware analysis report

Static analysis result for SHA-256 59dada55b979fac5…

MALICIOUS

PDF

84.8 KB Created: 2021-09-01 20:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ee5066e61248e60dc9e38cc7412fbd82 SHA-1: c3573e2a762c3da0d971ed63cf88f06b75a62ad6 SHA-256: 59dada55b979fac5c779799650f8932b60fc727c806668290f71e3ffaeac974f
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/96a6cccf370660d9d44ed866f08a8b70/3555487487.pdf In PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/696kti013ctjiggbjjvffjh8tr/gojona.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/598c2b65ad86ed18f14d3cea887a124f/2964395387.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/tuniwameg.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/94080263377.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/188ba81be4a103e18e7801bb5a61295c/7375659502.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/37376810307.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/nizafibofogulu.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/u5en83q2fncttuhtavaedsgi6p/wugipinig.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/xenegowozefedidemomudiner.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210620194606.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f391ee3cef---debuvasazefe.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/86933468963.pdfIn PDF document text
    • http://point-grey-1970-grads.com/clients/f/fe/fe7686cf254963525dc0bd811951f15e/File/61870365393.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752d95c5508---57451604597.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/tatematilusiwej.pdfIn PDF document text
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/18586343384.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/ketojakinagagedopupidoduw.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021051310222689.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1159f82bb0---24438403299.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/46304232312.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/8863634844.pdfIn PDF document text
    • http://an-professional.ru/img/files/file/12400495564.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b84dd90b66c---64390449984.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/namunuvulamesigurilat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=teaching+learning+material+for+science+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_off0000e450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE450 17936 bytes
SHA-256: 43ad2e241d8fb6d6efecfbca19efe573b862a681419a724e599e0b2d2868b2ae
font_01_sfnt_off000112b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC7 11028 bytes
SHA-256: 146985a7db24f52588d1c79e1def492ede3afe842ad7e851faedac0053247512