Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7200782e6b443b5…

MALICIOUS

PDF

86.5 KB Created: 2021-08-21 02:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ca034b9b79f9d2da811e8f1834fa5157 SHA-1: cee6d7c1c15f3a78cd263f98decc1bc97de7620a SHA-256: a7200782e6b443b56d8b3f55efdf766754d2cab9ab6e8a5dd55f0592ccd671a3
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 a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS uploads or disposable domains. The presence of these links suggests an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maslag.eu/userfiles/file/pogiredowijexunosokifexaw.pdf In PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/ganasiz.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ee201c84da7---2618735098.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/14402041588.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/7742016f9a6e8793a3a9a0547d46f1e5/xigaraz.pdfIn PDF document text
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/kikarigafer.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/70539256703.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/6nvbb6vvgg3td8ott7r0v8s922/26209437219.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/ligobinikomijesegarerux.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/zitobidutadovewerebagu.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/sepix.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/71091603678.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/27732468509.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/sadedexanodexupebim.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210821054422.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607366bad722f---raxad.pdfIn PDF document text
    • https://faceless.me/userfiles/files/werizufuk.pdfIn PDF document text
    • http://angeladaniel.de/uploads/files/89327906176.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e488b4a9476---mijiwezurot.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/p9ca66a9a8rsubdemie70vgv19/tibifagi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=mario+bros+dibujos+en+cuadriculaPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8569d99821---91257423308.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_off0000ed7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7E 10628 bytes
SHA-256: cdacee0869e8900b4c7b58d08ea9532b6364170b4e6e912342f11302de3f433e
font_01_sfnt_off000105d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D7 17608 bytes
SHA-256: f1d995bbdd49795bf06f3b44cad9095a28a1fa72fc9d414a6c3d4ee8a4bccd66
font_02_sfnt_off0001328b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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