Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abcc53e4b11f671…

MALICIOUS

PDF

76.7 KB Created: 2021-09-19 19:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b5334d2854143f62781fa1d0508cba47 SHA-1: 93e3f0fcc16b8054b74f9df41069c0dc8800f5d8 SHA-256: 6abcc53e4b11f671bf2ad7bf9fd13d51e9f084f1d8b1a55970f92d68bb89e048
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' lure further supports a malicious intent to trick users into downloading further payloads or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7e4121677---48245809539.pdf In PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/somuvixibazozobisujiboli.pdfIn PDF document text
    • https://greenfins-thailand.org/uploads/file/gutaxewid.pdfIn PDF document text
    • http://tolaniprojects.com/userfiles/file/vinid.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/8022978359.pdfIn PDF document text
    • http://aminotp.com/upload/files/38933253450.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144ba10552df---fabixaverisalavewipeduwa.pdfIn PDF document text
    • https://sma-dfgg.org/site/admin/file/4318892284.pdfIn PDF document text
    • http://portableandcool.com/files/files/jijulevifupetat.pdfIn PDF document text
    • https://gsm.company/ckfinder/userfiles/files/kadizafeg.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/lotjhdl7ok3p8vdv2cd03nrpbu/rivimefupezivujegabemap.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/74683095471.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/welinazudevujuvigixex.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/67066430299.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/89780933513.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1614042e0dc4ef---magigexogajefi.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/wawuzizit.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee0e73ef26---raxexas.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/1943477106.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/16292272110.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/didetoxejiwu.pdfIn PDF document text
    • https://www.sacict.or.th/ckfinder/userfiles/files/75176995328.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/8767eb6147aece779d36f82b381c0e29/kekunet.pdfIn PDF document text
    • https://energooptima.hu/upload/File/ledulokifemonuvoxizefin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=turbo+fly+hd+apkPDF 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_off0000c702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC702 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF19 10408 bytes
SHA-256: 940e21d3c2a8b3cfaeb2d270a441678d4b100d2321b8aebe3030fffc766670fe
font_02_sfnt_off0000f68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68C 18216 bytes
SHA-256: b46e1a7a07bd8cf389a7e8ec61a2ccd72d7e00102a950c92300580574c42925f

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