Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a84ba71bbb18090…

MALICIOUS

PDF

82.1 KB Created: 2021-06-06 14:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 34bd362a3a03fd8689918a1c536213f8 SHA-1: 2cb8233f7047984ca02bdd487aef05c435542b23 SHA-256: 9a84ba71bbb18090083c6986cfa8c25f5f9f0c4a8786bfbe638bcfc272fb713f
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing and trojan activity. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pistant.ru/uplcv?utm_term=definicion+de+literatura+segun+autores+pdf PDF link annotation
    • http://jestbogiem.pl/app/webroot/uploads/file/kisivupul.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/48578747013.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/17leinrfgiqdi9359knnaqpe3o/punopojalalawigu.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/0c2e5257b28e954a5e92434cec5b2cd4/disugonudazotawewivoxuza.pdfIn PDF document text
    • https://foulardfotografando.it/file/jexulenibolidu.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b19c1120ba0---fowidivobosowinajiv.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/kawogebudazasebikem.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/zajedilefupavatujepiwezo.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160722bb5f3c9e---88009200052.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/nimiledeke.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/404ac2f05fe500585747d517cf4872fe/metakenedozakuvizegagasu.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2ee5727ae---tirofi.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/stgv6728lqphf83h8l3ml3n4n5/58887009557.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/eqkq78nehld43gsbg9qhi6jl43/veponika.pdfIn PDF document text
    • http://yuha.be/_files/file/mesotitonif.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/regan.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/35922793134.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/warosexaninevivojuvusira.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF2 5204 bytes
SHA-256: 8101c53dc2ad62fee7cbd391547d6bd4a5064e0b45d49a3407865275b6b4745f
font_01_sfnt_off0000eeb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB1 11824 bytes
SHA-256: a81bd375f16bf7946a8595e093689eaa1beb7701ad7f42f82a7b16d8e8daf531
font_02_sfnt_off000114af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AF 16416 bytes
SHA-256: e1b2b4688557f53d7bb3b0cae3646c5c298247c7f5722a4b8c84b67043f591e1
font_03_sfnt_off00012aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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