Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df362cb7449732d…

MALICIOUS

PDF

89.0 KB Created: 2021-09-09 17:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f8ccb1ddf6fe84aad658750d8bf40112 SHA-1: 7a8befef7db5bd4aa866ba30133c00b24117f9e6 SHA-256: 0df362cb7449732d37bf9c91f75e6971c97a1ea918e5a3ec2a8f46f3c800c669
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on potentially disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • 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 http://tetobox-budapest.hu/uploads/files/zilamafozotopedasu.pdf In PDF document text
    • http://edu-soft.ru/site/htmlimages/file/27505201974.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/muvitasimuvom.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/zatipetuwikuwim.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16130a8b9f25f5---pidiferurorofemubetepo.pdfIn PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/nisusaboxinesepid.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/86971527872.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/fafulojidekumeles.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/fowisikaxasusalajugot.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/28395199829.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210908200526_odpuc4.pdfIn PDF document text
    • http://rsport.eu/yonexshop/static/file/gogijonu.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/sumagafaverosegefibelil.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-1/20210901102508369629.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/88325648741.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/56709975034.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/dumogozitu.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/1603239025.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/35913211330.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/82740029887.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/161387a7c45ae1---bepetetisenuregavinif.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/33813980061.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/37302490173.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/pijowo.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/xenogab.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/xilurirexuze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=list+of+2015+android+gamesPDF 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_off0000f561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF561 11036 bytes
SHA-256: 55b781e3123d4ba55c03d0fa5eb7e948cc446ad6caa41e7f28f81298a03ff919
font_01_sfnt_off00010efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFD 18244 bytes
SHA-256: 6ddd69b04a79d983542b66a10b9d54f85dcc00ac768e0021f0866f8513620284
font_02_sfnt_off00013e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1