Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef1d114ff900a2f…

MALICIOUS

PDF

74.7 KB Created: 2021-08-29 19:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be787b3b5b793107b1b1a700b5241df0 SHA-1: 18bd915c18bc9f54a51006c08569f0e2cb020647 SHA-256: 2ef1d114ff900a2f661e79f9915bee51450ab9e773b3640f8eab7d89e77e87b3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, specifically targeting upload directories, and also includes a direct link to a malicious PDF. The presence of these links suggests the document is designed to redirect users to potentially harmful content, likely for phishing or malware delivery. No scripts were extracted, but the heuristic firings strongly indicate a malicious intent to exploit user interaction with embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://allytemp.ru/uplcv?utm_term=evington+dry+cleaners PDF link annotation
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160879fd703549---novibisabisarijivinuxup.pdfIn PDF document text
    • http://apcmagon.com/userfiles/52318091537.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f3177e74f9b---1675118159.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff66f8f2859---vimowonowatinafojef.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e03e6fbe7---81568288103.pdfIn PDF document text
    • https://digireg.nz/upload/81890817876.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/85f9da3b9cf6b55f27cbd4c34366543a/fojaxugo.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081952c466e4---xamuraluwuvesegolalel.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/s7sob9k2npnooc9qjpddpsm9lp/mafojadubaguzanovutudenuw.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/35776112070.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/62333201206.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/85749239145.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/47152993675.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///24503330721.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/kuxamagazeb.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/bibuvepitibolimutu.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/fubivofederotefe.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a61d0cfa13---gixiw.pdfIn PDF document text
    • http://labonscafe.com/userfiles/55482544334.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/birigifazol.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ac93c8b3b4a---99209613902.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160859f035c15d---72758273634.pdfIn PDF document text
    • https://rcot.org/userfiles/file/48127359117.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099ae0130242---18083402895.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/5eb55cc5f8ee5cc4b013cec69635eeb0/wakinusujobadejinile.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_off0000be4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4D 10708 bytes
SHA-256: 575f9bf123c193022c1f2e7438fa6656a6de82645e90056c1a6e7abe6ea9fa7a
font_01_sfnt_off0000d6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CC 17156 bytes
SHA-256: 2a908e52da8b952a7dfb44def404298e1b52bfdc73b1d61bd61ae67ff4d2bbb5
font_02_sfnt_off000102ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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