Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bda0bbdefc486d…

MALICIOUS

PDF

108.8 KB Created: 2021-06-29 04:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 447b011a780c468dbd8e7c692351a948 SHA-1: 12c3324d225ec887f2372fb63a058eef844b9f1d SHA-256: 64bda0bbdefc486dbc79d308f46a4ccda7b073c369b64f11e197485afac32cd8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a likely spearphishing attachment used to redirect victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://plncse.hu/php_data/file/wezadajanevile.pdf In PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92cd615df---18727716987.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbc48cd9e3---tadopajafirudililejuj.pdfIn PDF document text
    • http://recrute.fr/files/files/75756521851.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f6d7327e2---72555012564.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/36586635720.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6ab36f2f9---xujovape.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/f46914b92281eae6bdf4329d8bf997ec/31925002921.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/79712593254.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/57646189513.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/wozapap.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc313e1984---10686091609.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/33380796534.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ade775ac9e4---29278263797.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/806283fdffe10656436781347960a1ec/12370846663.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/03cdaf34c96bdee233733f5257dae778/61364743154.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160833ca75bfac---wufukobofujudiwej.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf17f467230---mifumonada.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/de367bca60274406267e9706cdc5bcf3/tekasifeluduxinu.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/zubomal.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609400f946551---61715480302.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/58e73654914f85402774f827be171208/61177220187.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/tukoxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=may+allah+protect+you+from+any+harmPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001339e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1339E 22468 bytes
SHA-256: 5e8cd19a15a6151e21cf38494338e89e0487a517c9b5f3f10bf2ff231bde5898
font_02_sfnt_off00015b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B57 10692 bytes
SHA-256: 8253810589e830988055cdb36524bfba01fd20945f1493db10d0e8be6799c3c2
font_03_sfnt_off000173bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173BB 18924 bytes
SHA-256: 9700ad59231396c81e9d256f2ce53a0220b8b278743d619364847f1cd0dca797

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