Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e75c8fa79c7bdf0…

MALICIOUS

PDF

79.4 KB Created: 2021-09-04 17:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 54bb08d17df5052fe866ba501d675961 SHA-1: 83335bd6bfc902ccaa3f1fad6173700a2cd135ed SHA-256: 2e75c8fa79c7bdf05435fdc8d756f691bc2e31e18e54c7b4cfeadd14563df803
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://editionsitaliques.com/userfiles/file/42083776213.pdf In PDF document text
    • https://tbsva.org/Upload/files/20210903230530.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/xogewu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796792d401d---66895076082.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160905745e1f10---zufosugewukoziledovawe.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210621_6B31C429B54CD9F3.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/borakuxugizokepipa.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/muxakuwofumutukesusowapew.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/64063623576.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/74ed4f39e444d76582449dd3492d6fe1/koparevotedijux.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071cb6220345---xukisezufewufibedovowepas.pdfIn PDF document text
    • http://harrisonfamilyreunion.org/clients/868801/File/43866735348.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/suzesutoge.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/mapipujagigafojo.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/72034679961.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/i6kvme0ujj5bdc8ki5ro1pcls6/virepadoni.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/rovabepatev.pdfIn PDF document text
    • http://dancingstarsgreenwich.net/clients/1/10/10f73e4104fe6082999c9b722aa65ba2/File/segozogekesipunis.pdfIn PDF document text
    • https://iuoshili.com/upload/users/files/sefifap.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/b8c65c5a7729e017a1719bedc8484f96/funazore.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/hrksuboo0ik2skaft2oqvuhg22/xijuxojomavineta.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b113982337eb98ff487b26f030b9903b/bonajezajak.pdfIn PDF document text
    • http://renknh.com/ckupload/files/41801511532.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=math+worksheets+printable+2nd+gradePDF 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_off0000d31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 11104 bytes
SHA-256: 958daf068487206ab2f48b00bdf701eda7758d2b0c8d2267ded1b1744bc6eecb
font_02_sfnt_off000104b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B5 16812 bytes
SHA-256: bcf223eea9e40d7dbfe462f2cf07587dfb6738550c00e23866aa7e51b99efd63