Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7600bcc2c881e2c…

MALICIOUS

PDF

89.1 KB Created: 2021-08-03 20:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f4edb170c8b65428a1406a69c5a6fded SHA-1: d9164ff61b23e8ce48014fa9e4af69f53eadf274 SHA-256: c7600bcc2c881e2c68fadfbce001c04eba781b1a6faacced430ca2d404f5e606
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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=pwr+sweat+review PDF link annotation
    • https://ferdavagnar.is/images/fck/file/gixogimaxumegumedifapuvot.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/mojofexasop.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/me7e1hoief2b4gbs131rv3l97u/kitexazonuk.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/50079682584.pdfIn PDF document text
    • http://www.ks-zahnarztpraxis.de/upload/files/86138398149.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/favolibumexosavikugov.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/e47de6cbe15cad2f428d8c2b394f6f53/99248347044.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16078feb673fd3---fuxemexuwogalefibijavo.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/60516999904.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3faf652fc---58945668984.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/fosikowipiwejodabilizaku.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c2896f60b96---nudodef.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/pusubemigoduv.pdfIn PDF document text
    • http://zuche0551.com/upload/file/mezezudebiwuluxugikediko.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de314a0f849---negapoziwegu.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/p2bjcspbfodoq0mcb6cki22vac/rurefuwemogomunazub.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072b88d272e7---78702366953.pdfIn PDF document text
    • http://emannsltd.com/userfiles/fojafanuzowaluw.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/fiparubalele.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/d75957c73887423f26b661d056cc8326/zodososevilixalifetexiv.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/riwokidunamupazifasudumat.pdfIn PDF document text
    • https://taxiporec.top/wp-content/plugins/super-forms/uploads/php/files/3caeln2c0dfe8g125m931959mf/87304575636.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a74e02ed31---petixewos.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/9ccbe3cecdb61fe3d3bbfa61db494bcb/lelamifuvepusejasazakob.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108e8207c4d7---33394653813.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/6fc61736620a908af078441086e5205d/85888381407.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_off0000fab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB9 17300 bytes
SHA-256: 3116d01ecbb85043c8fe3fea44a60cd70028bfe26a465a43b099355a32128ca7
font_01_sfnt_off00012760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12760 9984 bytes
SHA-256: 0625ea420ce74eae41c0361359902c08d0c5b973e34a8054e75e6c1b36cb0de1
font_02_sfnt_off00013dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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