Malicious PDF — malware analysis report

Static analysis result for SHA-256 75cb224973943621…

MALICIOUS

PDF

74.9 KB Created: 2021-09-02 21:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 566b942d0d11e85296373d0517936e4a SHA-1: c325fb06b8b7a0ac3fcad3281370e03b1acfb9d9 SHA-256: 75cb2249739436213c002f7afa830b606262f66586b7f9fd6f5d7733ff6855be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, many hosted on potentially compromised or disposable domains. While no scripts were extracted, the structure and numerous external links suggest the document is designed to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://cructi.ru/uplcv?utm_term=prosedur+suction+pdf PDF link annotation
    • https://directorvincentchow.com/fck_filemanager_upload/file/83226048853.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202107file/2021072001221370554.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/zakawadupimu.pdfIn PDF document text
    • http://eraucheta.ru/uploads/file/91614124535.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210808_D4F5522CCD5B3D58.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/81616566770.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161254f4757752---17211188964.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/18dcc11d7155c8f19fe637f7c981c78c/gosekerumupidabananimaz.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/28645274788.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/bafovunerix.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/xomegasobubomujasizitu.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/d01c47a6a5cfa8d82b11e2e946375192/91975714110.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/barozozogopa.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/16118274484.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/vokabiremeveg.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160730800c9662---47510668271.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/11639383164.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/tenulonelejizajixi.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/xilevumom.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/musuzerewowubox.pdfIn PDF document text
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/39597719772.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/80b0ad7e648705979e4ef862f7c52689/fafemurifigekesu.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/bc24fd457686dc27225a120987a1659f/lobowusuf.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d5bd634229d8f353e22a1af72701eacf/48054339878.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_off0000c2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A4 10504 bytes
SHA-256: 621c95ab8bf08b7f508ed92fc93013f95f5d4e1b633b7298954acfccabc05e7d
font_01_sfnt_off0000daa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA9 16796 bytes
SHA-256: ab69944a3e9f485da6ef3da917d01edc7833d0f4c335c5b60606d274a124fc5b
font_02_sfnt_off000105d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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