Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca72e212ee4abd5…

MALICIOUS

PDF

70.4 KB Created: 2021-09-29 05:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 5784a30dda615b3cb45e1817ad83749e SHA-1: 49867d4668569bc847c12bf2ce15fefc51127009 SHA-256: 1ca72e212ee4abd5d9539d3c8044d65fb6242f94e0957b2103a1d68817274c27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable domains or compromised WordPress sites, suggesting a phishing or malware distribution lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pixomot.ru/uplcv?utm_term=max+payne+game+for+android+free+download PDF link annotation
    • http://citlak.de/admin/UserFiles/file/runutupok.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/tokiwoketud.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/34129229408.pdfIn PDF document text
    • http://mibenjamin.com/userfiles/file/72937848916.pdfIn PDF document text
    • https://stancijanegrin.com/userfiles/file/86076840321.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/29621678741.pdfIn PDF document text
    • https://essuances.com/ckfinder/userfiles/files/44041371047.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7a8699ada---72228012457.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/fukigidokazalugigalu.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/79087983571.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/ramodenewipenomisotuka.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/nerevakokowaju.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615250db2f643---26773312645.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/17403657304.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16146b79ecf45f---98678964305.pdfIn PDF document text
    • https://ltes.tw-goods.com/UserFiles/files/54865396618.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/tamagap.pdfIn PDF document text
    • https://sme.bankai.lv/ckfinder/userfiles/files/fiwadaxesu.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/mabirinetodozak.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/judozosasotubopojizolixu.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/tufalepedavavagotovu.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/tudojufap.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/69557972684.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/gogav.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_off0000b0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BB 10872 bytes
SHA-256: 9a51d4e89b305397ee198c3c7c530155ad45749a79df83d052b1279f5d0132da
font_02_sfnt_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 16576 bytes
SHA-256: c20a7150072f467f4f9aa71b06000db9caedca9e2be09fb221557c2a5e5f6d93

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