Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a575117c215af42…

MALICIOUS

PDF

73.3 KB Created: 2021-09-27 13:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 617334e7714cb7f86cbe0b295065c72d SHA-1: 3cea9bf1be799bc07c18128d106fd2bdf5039e18 SHA-256: 2a575117c215af4254e737d7b693b6482086536c2175e6f40190f797f4031484
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links, many of which point to disposable hosting or compromised CMS uploads, indicative of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to phish or deliver a secondary payload. The presence of embedded JavaScript (T1059.007) supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://algarestofos.pnh.pt/js/ckfinder/userfiles/files/40042842567.pdf In PDF document text
    • https://yunglin.com/uploadpic/files/wuvejusenafokagatubuwe.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/jomibosuwavabizajajod.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/sirenut.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/98640785805.pdfIn PDF document text
    • https://ikansambel.com/contents/files/fugop.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/tonodebizad.pdfIn PDF document text
    • https://activsport.ro/userfiles/file/6869610355.pdfIn PDF document text
    • http://ativn.com/upload/file/garerevu.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/96113763675.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/39511565887.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/46e859ab7ed7f6050842e62adbbf16ca/piwefozigasijutaxixiwu.pdfIn PDF document text
    • http://highlevel.pl/userfiles/file/sewagigitesawepelumiv.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/pusixubilukigogabowiwipe.pdfIn PDF document text
    • http://anduong-nhatthanh.com/uploads/news_file/30555051981.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/73447771377.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/fevaka.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/wulisalubinikos.pdfIn PDF document text
    • https://jagominum.com/contents/files/texusukorijopesuzesux.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eaf042a552---4005926955.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/41222125910.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1613b779ae43a9---pawumevuwumuredif.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/1112883d7aac8571054517dcd59aa5d1/69463337503.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/69088277518.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=kala+shah+kala+full+movie+download+mr+jattPDF 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_off0000b3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D0 11084 bytes
SHA-256: ef77b5e631a03b92d2caa8030fc933225efefbda89c0739eb5287b23b339aec9
font_01_sfnt_off0000cd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7B 18516 bytes
SHA-256: eadb339a4571f29e73615c1b7a16c16adad8aad55883b82391b09a2252d0e9e2
font_02_sfnt_off0000fd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1