Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce69a5f69e547f2f…

MALICIOUS

PDF

83.6 KB Created: 2021-09-04 02:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2984bc1ba910131316ad120096dee6ae SHA-1: 1b0cf9bbc7fae62899a63f4b0bfccede8f2a5b24 SHA-256: ce69a5f69e547f2f2fdcb62bf9a6b52ec29db30200491e0ffe56ad69ed42887d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a PDF link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF format often utilizes JavaScript for malicious actions, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://chcial.ru/uplcv?utm_term=breville+espresso+machine+bes830xl+manual PDF link annotation
    • https://triosms.com/userfiles/file/99555986659.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/f0e93613f4ab3d495aac9759e20449c7/32387617933.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/lebugixevipasuz.pdfIn PDF document text
    • http://svx.su/ffile/file/54508650580.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210719151354.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/rowunadupobipotisajevit.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/12631798446.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/gosereta.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/12678579562.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/gixoxenugoxilu.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0232c1f902---4602129877.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/14952131020.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/c4606c672c9afd66ea2cbe189f11481d/836732508.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/6bfe48075d549a4d210f8021d9dfc121/10474758849.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/pofovokasujitonifa.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/3222626508.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/db6dumu5qtukig36buf6rk8ufj/kefinuwibajisiludetazij.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/xakogawazavuz.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84f7d2c83---bejedatafiladobimak.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/51423131311.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/nidiparadibafejevubuwi.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe7c6d3c99---68518608605.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/gazizixodexetikujeduz.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0e8b9df76---22645915509.pdfIn PDF document text
    • http://macap.nl/app/webroot/files/userfiles/files/15545088971.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_off0000dfa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BA 11504 bytes
SHA-256: 656627fcae9af4c547fb962829c15ec8c27f3903bde5e65bb75231c4704a191e
font_02_sfnt_off00011293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11293 17772 bytes
SHA-256: 32f205e37b77358792df1fb40a8f95ed7d75f9cc5d7b5d84a262cf7559853641

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