Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3d14693c22246a…

MALICIOUS

PDF

86.1 KB Created: 2021-06-28 03:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 8751b184497ee64c6262102ee01d5759 SHA-1: 54ada32dc4afa0f716863b59a25a5fc3d97452a6 SHA-256: 1a3d14693c22246a38a847ed1a4f766a093e0b7dbe18634eed50b58990908308
164 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan PDF. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content. The presence of a 'download' lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://birkhoffhi.com/userfiles/files/55520277814.pdf In PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1058bd0e85---vewufuvavupobatet.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/8124248513.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160d78ebf5732d---37834609942.pdfIn PDF document text
    • http://asahiru-ban.com/files/files/83980123081.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/ouubg270sukfo97ur5uu5lgrg6/91288930004.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160870a2b21e03---5605624040.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6dcce69547---69001241443.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607300fb366a7---xirerodoketuvo.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/da353fe35330061e0e7a62819f6cbd9c/nedofakatuzufojugubexi.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210628090130.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/96849006422.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/0d28e4dc12d62ff629443d33fe6bb366/pukewasokaga.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/pudixaketamat.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac59d2222aa---15838416829.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967a9e44e3d---vajab.pdfIn PDF document text
    • http://billsky.ee/files/file/wewixewogizonoveji.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a6045465c---60001474423.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/lobinuli.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/84463377694.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/49127627432.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/108df3d778b6d42be8624d693d595453/buxokuzubitukez.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/dobamelulafexariloda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=gst+calculation+excel+sheet+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10309 17932 bytes
SHA-256: c528409501997377bc99fc321c5c2f6fa92ca1494e51121a24f5245b15a90328
font_02_sfnt_off000132b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B9 10692 bytes
SHA-256: e0c3aef9575035eac0dfc6f75206cee3de92f16fb4988158da63be75dd493336

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