Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae64afe604812c4…

MALICIOUS

PDF

79.9 KB Created: 2021-09-04 21:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 123cfba07fe2fb60754aabf71a764aed SHA-1: 9301348ed46cf031c2878d2556e05e0c10b31f6c SHA-256: eae64afe604812c44d2614a7fe4834ca165b894363d8bdd6866fd38cddebc83e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external URIs pointing to compromised WordPress sites and other domains, likely to lure users to malicious content. The presence of multiple external links and the 'link farm' heuristic strongly suggest an attempt to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://catamma.ru/uplcv?utm_term=3rd+grade+math+spiral+review+pdf PDF link annotation
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2addae88e---vizero.pdfIn PDF document text
    • https://topupdana.com/contents//files/70626528917.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16102f06f71ab1---56041685827.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/523ec9229467ae1c667f96d1622cb615/wolamejo.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/vorox.pdfIn PDF document text
    • https://irantruck.ir/data/file/debafabenunenenizig.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/43538079803.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/250cce0c0d5d6784849e1e2bd8d8c11b/31006291185.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/dsvp61b2rertenqhb1qgdhdp1i/20133227557.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/wimir.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/5v45iosj58dbk377hjlh8egk25/5582171428.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/zetakep.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/23773834954.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/dd3ac1f0048c3103c6554d212707e1ae/zovitarefegutu.pdfIn PDF document text
    • http://lroundup.com/clients/d/d7/d7466da0ad72d96b64793f89c518a0d9/File/zibibivuj.pdfIn PDF document text
    • http://asid.rw/userfiles/file/migegibija.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/2067621103.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/fejesifedumavirox.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf8386210b---32063153379.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/rodegepujozekosis.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/47003333591.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb407da947---xetevulotupasejemejawobux.pdfIn PDF document text
    • 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_off0000d5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A2 16972 bytes
SHA-256: baa67c1e746b2ec2b2df7bdd119239586387f9099347750c73860a8413205744
font_01_sfnt_off00010102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10102 10948 bytes
SHA-256: 2fb729f767e36acbb517626e74d7d3f68988e15ab8f5d56b712267fc20d8f8ff
font_02_sfnt_off00011a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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