Malicious PDF — malware analysis report

Static analysis result for SHA-256 db272c16ea8029e0…

MALICIOUS

PDF

107.1 KB Created: 2021-08-08 21:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3707e4141fbbc4029a54ec64edb1411f SHA-1: b93cf0dde304c5e36c423930a5a4a9c92182ac52 SHA-256: db272c16ea8029e03d2d434df66186e60c78a62067962da998b2b97cfecbd8db
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress uploads and disposable hosting, indicating a link farm designed to redirect users to malicious sites. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly suggests malicious intent. The presence of multiple external URIs and link farms points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9881

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://chcial.ru/uplcv?utm_term=coping+skills+for+addiction+worksheets PDF link annotation
    • http://womensmentalhealthmd.com/clients/9/9a/9a9ccad1be43d50cbc9928f06550b956/File/bobuwenujobatuwunimigu.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/cq3gas9o9dgjr379qs1lhkm50r/83016668503.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/kikozovegi.pdfIn PDF document text
    • http://www.manorbymajor.com/userfiles/files/xuririkekuxotibigel.pdfIn PDF document text
    • http://446888.top/userfiles/file/vidusakuwiketulikisuz.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/5cd5285ebd8f7464dbffa3925341ce32/25015191174.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/rrmr6nosahadmjdsstt20uajnr/xesevebixanuzazafun.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/958368f7c1776363062b738fef074c6d/92955700414.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/49593072006.pdfIn PDF document text
    • http://mebizstekla.ru/userfiles/file/deredawatinajademutoravak.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d23cb972e7---nezujopezu.pdfIn PDF document text
    • https://ruh-center.ru/userfiles/file/xiwifiwavokaduzumuw.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/ftb2873g8lugluv80lqml5ujct/gekekapapugaziduse.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cff1481bc17---tazizojumap.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/46454693887.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/p7eqekvjcev7eh8v4vs8mct684/37749646625.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16095e950eafc5---19216214372.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/50383450379.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/tezesurunigu.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/f333bcadeb349ae80e34af30f4e45098/jabizoza.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/rezejuru.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/01c01727b8d6e02a1acf29f0f164979f/85599250028.pdfIn PDF document text
    • https://negaratoto.com/contents//files/zoxuwukevasu.pdfIn PDF document text
    • http://veivel.com/userfiles/file/forubesufaxo.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/fofebanimamutudi.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/37b975ffc3086eb19a430d6f0ab2ce49/nusugifabanekije.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_off00013c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15498 17616 bytes
SHA-256: e59f6430e80494ec8a7c0bdbd7d71a8a0b1354f99b7c3921e141244dc63f0997
font_02_sfnt_off000182e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182E9 11108 bytes
SHA-256: 4d88f832bc53319a17255d3c3c779c45e9987ac82fd9a6a12c5a5900b046ce46

Open this report in the interactive analyzer, or submit your own file for analysis.