Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce4f09ae09a5c0e…

MALICIOUS

PDF

101.8 KB Created: 2021-07-06 08:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: dadda7557aaf95db5826c78b2df6662f SHA-1: 57be652331f2f11f604458261648d2ab7617a2cf SHA-256: 1ce4f09ae09a5c0ec360561ef734050abd6927c6cd04733dc338bbab637c7067
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9743

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=skidding+meaning+in+english PDF link annotation
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f3020c39d---vurexukujeni.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/ed373f86b92a6ea57111d912e6ffc904/21479512098.pdfIn PDF document text
    • http://rajeshjshahani.com/clients/d/de/defaee86e9f1fedea086b53a5072ac2c/File/waluvir.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4413c6778---70343973375.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dni9a240absj61ae1maansvs04/97839133538.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-06-22/images/files/joxurekaju.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b678a678d27---kovimujadovevotodipix.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160945d96c658e---gogag.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6fbf96250---67814531559.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7feb685f7---30237544275.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/552b535d7cd513f820181708fc8fcd5e/satuvodejitofi.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087466b296d5---fefuwini.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/53698080958.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c8847afb2---wereziril.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/347odk17l47da8oalg5borl6sh/71781240333.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbd817107c---rorunubipipes.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/ludutobobobube.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/8535482807.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/ics2mqpelutlji15m4s8vf0di1/15226479105.pdfIn PDF document text
    • http://bdn10.cz/files/file/22940898354.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/famvf1skjs5pl9ou0516bv1ejf/wokidujowowubinupanufobe.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d070ee0680---ninumibofufoluxizer.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/92530333777.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607196f613e93---3879466101.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/8912130a84dd28d7e5b47dc4876f05f4/87967116709.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000e59a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE59A 19224 bytes
SHA-256: ff3acc122d03ec1baacecd829fdec70f1b7f886a5fb2a915d04e27b87e15e671
font_01_sfnt_off0001059a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059A 10544 bytes
SHA-256: b4ba41c3a5686e61fa5f5c510b30633a904a25f2ef8560a2eea38dd451d099c6
font_02_sfnt_off00011d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1D 4524 bytes
SHA-256: c8ad3028fb19fedc8ef5313b8de7209c0fde055ac607152a96bec87e1f355c01
font_03_sfnt_off00012dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFD 26904 bytes
SHA-256: f06da80e776fa4668cc682bc6008ccad42e5dc72cc311f81edf978fa0c1276e5
font_04_sfnt_off00016f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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