Malicious PDF — malware analysis report

Static analysis result for SHA-256 94309ae23c3a35b0…

MALICIOUS

PDF

85.7 KB Created: 2021-06-26 07:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4e2e390015935e0a2b2898ef04c222bc SHA-1: e6a458492d44aaf61d46fcdec64a0385da2481cb SHA-256: 94309ae23c3a35b0472d87f5b925d59a3fe7b8705475d5987ba0553da71dfae1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a PDF link farm pointing to compromised WordPress upload storage, suggesting a phishing or SEO manipulation scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea1f79ddf5---30303996801.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/jobejizadipagogizoraja.pdf
    • http://christopherdallo.com/file/gipuga.pdf
    • https://mlmrockstars.com/ckfinder/userfiles/files/21058467171.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaffa9545d---xamanemudesapuzoxe.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4c00683e7---30119770621.pdf
    • http://ajivikafinance.com/userfiles/file/lofanoneribomij.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16079a48a9d58e---5165355966.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/r8j8h8plubono0bpit95a8rqp9/roxin.pdf
    • http://ibshop.gr/uploads/_uploads/files/fijinibofasoginijuzopusi.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/919gougmb2pna2ni6vcn63f434/78162522745.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9e3bd7f3e---tivokemoxatuxotasurawu.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ade23a24ab---25294156458.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/f8789f7409f6c5a8361909eb923c1b33/jesaveti.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f619c19b2---37156329734.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/muwobuj.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/jo5h4qqiiuhf105t678ar5odi9/12585264735.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607939bcaa1aa---27261649772.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/aeb7dbe76e914343208dc4ecfc4afecd/25937762875.pdf
    • http://change-sexy.com/files/files/midevibakaliselosej.pdf
    • http://oilandgaswork.com/userfiles/file/rugujoziwejuripitojowagi.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707df8c824b---49001516336.pdf
    • https://piuspvc.it/userfiles/file/5690186262.pdf
    • http://www.asslar.de/downloads/bokifugezasekatopeg.pdf
    • https://circolodelpistone.ch/userfiles/file/46293596238.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/kbcofqbd9thh8gc1o3g8gal8i1/joxumenixesogijolixobebu.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/k5apnqake13iad9ngabpo25jvg/guzukadozi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=r+to+acre
    • 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_off0000ec59.bin
d48bb3218630892d9ddf1ea68254c7ab50afba56e1e48329d3d3c7ceba1272b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC59 17464 bytes
font_01_sfnt_off00011a3b.bin
ea1f063aff3e1b2ffe1e19f71ddfb8cf8af6e265df62e9326b8870cddf639c5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3B 9856 bytes
font_02_sfnt_off0001300f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1300F 16792 bytes