Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba80d734ebf04604…

MALICIOUS

PDF

70.6 KB Created: 2021-09-11 14:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0367c788a011623b54eeae1569179ad5 SHA-1: 4c73226a0ff014640f6520e8d335afc67ddbb326 SHA-256: ba80d734ebf04604ae5841003559138197db183e86f0d778a5753dc57cb92a03
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to direct users to external, potentially harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://magyaringatlanadatbazis.hu/dev/_user/file/doxesifasojemilonetevupa.pdf In PDF document text
    • http://studiofapas.it/userfiles/files/nojitej.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/lagopovagelizez.pdfIn PDF document text
    • https://ciar.vn/uploads/image/files/gusadadozevugobugaxep.pdfIn PDF document text
    • https://mountmoriahcamp.com/media/1811130891.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/41455820225.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/69866868029.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/45812729402.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/dumeliromoxinexazop.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/54829399646.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/74463037488.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613783b147ed5---lepapugodilamisinonoloniv.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/1124419935613c1d1f6c212.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/migivijodujuferumurese.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/fubemi.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/57312677099.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b09bc99270---20969084676.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/nixiwexetunoxi.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/bamujizonumi.pdfIn PDF document text
    • https://matrixx.lu/images/85050352295.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613c05cd092e7---94064065894.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=mar+gaye+oye+loko+download+full+moviePDF 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_off0000b17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB17E 16512 bytes
SHA-256: 0584ab12825dc005a6288ef4c3c31607d3f5da1c75903dbbec261d4d90ffced1
font_01_sfnt_off0000dc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC10 10880 bytes
SHA-256: 11575d28a879648d513e7b1ba7eb55974443f8a03db019925e634648aa4d3e9e
font_02_sfnt_off0000f506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF506 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1