Malicious PDF — malware analysis report

Static analysis result for SHA-256 867af6ba63ea8bdb…

MALICIOUS

PDF

94.6 KB Created: 2021-09-09 19:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 68acae57cb7e0e41c57de553f0c8c4cb SHA-1: b78f5fa58694fd401649e11d67aa44b0e5cf2fe3 SHA-256: 867af6ba63ea8bdb352ec759bb2cf8f4afa623789bfb5148b5ade5484a02b254
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript and numerous external URIs, suggesting it is designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a large number of links on disposable hosting, characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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.
  • 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://shop-ecobati.com/medias/upload/files/magaxavevosenenuxewemod.pdf In PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/42338125502.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kotareruzomuxijatopolos.pdfIn PDF document text
    • https://chulintemple.house-well.com/CKEdit/upload/files/wiwamevusuvuleji.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/zilotilabobuxetefezowixe.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/51611870071.pdfIn PDF document text
    • http://www.me.ntou.edu.tw/ckfinder/userfiles/files/20210905_112644.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/71304413136.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/94747202035.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/71901503550.pdfIn PDF document text
    • http://longarmquiltingacadamy.com/fckeditor/userfiles/file/pulalabobu.pdfIn PDF document text
    • http://sakem.org/userfiles/files/kurujezezadusibo.pdfIn PDF document text
    • http://lrpharmaceutical.com/upload/files/10602577659.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/36735375740.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/84a6e611df94da01f355abfd4b2a9323/ruzodulap.pdfIn PDF document text
    • http://xfswchem.com/upload/files/takasonanozu.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/xufakurite.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/rowogadojan.pdfIn PDF document text
    • https://tallerescarrion.com/uploads/file/80494971946.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/15434251018.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1631018747.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/27006414908.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/161383f58d4621---miwamew.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/39405003639.pdfIn PDF document text
    • http://vssteel1999.com/ckeditor/userfiles/files/totowexikaxowixewerumugo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=kandasamy+the+wedding+full+moviePDF 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_off0001045e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045E 11060 bytes
SHA-256: 5e79a0d736507180ab6dfe0ab0f3c07ad76649782451cbb3349f73ef6035f457
font_01_sfnt_off00011dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135DB 20684 bytes
SHA-256: 1f3fcf1af426fd71c08c2628a8694dfd2d572e6d61f45af994c3209701fd9622