Malicious PDF — malware analysis report

Static analysis result for SHA-256 69dbe58f00fa9b01…

MALICIOUS

PDF

84.1 KB Created: 2021-09-01 14:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f295c58e66e610c35783b3bed83c219d SHA-1: 94502b5deaa5154e366ef55107709775e0779509 SHA-256: 69dbe58f00fa9b010dd3abb9cc5d9dd6bc9cd5e067bc2729bfb52d4a921654ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous external URLs, many hosted on compromised CMS platforms or disposable domains, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity, potentially leveraging embedded JavaScript for further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://kimandyoo.com/userfiles/file/61608522956.pdf In PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/5eee77344d8cc1a6fd7bfa4038630d5c/8154334314.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12541351093.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/ruwemadedolufufaxopalapi.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/tidot.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/52266793768.pdfIn PDF document text
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/5fbt9fm2t1o5scftbr2n6bftus/36821602617.pdfIn PDF document text
    • http://waypl.pl/upload/File/dupegukapo.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/58381586248.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/zalagavu.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/c5294a19416f5ae579130c04221f17c8/ruwekobopeduluzejifom.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/tsvcimg31jb9ddl0edord2tnut/naramasuzixekigiza.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/31cb570b484b30a5b909869c62655815/tiwonikakavuwezepan.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/ladetet.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/708410237.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/nadokebaganuzetag.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/16925939615.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/kekekekirapabudusan.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607aadac2d91b---80708844794.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/38663188359.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/dixikomapi.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/jesorefuxujukof.pdfIn PDF document text
    • http://tolaniprojects.com/userfiles/file/45453212280.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/a9b773b3aedf0854d5796c2215a4be08/43819520669.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=messy+room+by+shel+silversteinPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C2 18504 bytes
SHA-256: 3d79198857388ba5df9755a439513df76f85c4d833f4c65d695cd6236442b424
font_01_sfnt_off000111a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BF 10524 bytes
SHA-256: c8ec046da6334354009d059233149078c98cbf6b34b98a316c977bb708f61efe

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