Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc30f9747e7aef0…

MALICIOUS

PDF

93.2 KB Created: 2021-09-05 19:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 38f48ed53e0ca6d6375cd0e11abfddc6 SHA-1: 32cf432a103eb221d0827a7744d35e0b7dfa1a88 SHA-256: 0dc30f9747e7aef06a5e72ef7d42ef6f6d6663c09b87d98d838689d7695d1b31
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://wastran.ru/uplcv?utm_term=importance+of+revenue+collection+pdf PDF link annotation
    • http://camberwelltaxi.com/survey/userfiles/files/wojikutubu.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/kanolafizu.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/kenakulufoguno.pdfIn PDF document text
    • http://falerisztika.hu/tmp/87927875699.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/28090372351.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/99326689452.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/vo118pl2lapdpkdbncqjkt3tm7/70467016982.pdfIn PDF document text
    • http://intertribo.sk/files/wupizaxinojixasipaxum.pdfIn PDF document text
    • http://chieucoingason.vn/files/bofosanikabamokejoxinuvu.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5a16a440c---36201960070.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/96509073615.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bf9a82538---86173130422.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612c680e52f1c---texomimetisegogupatofed.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/rexuzatikijafinabife.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16075b02d8d182---mepunifawuwovabojokador.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/20426122114.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/ca19c7bb9ebfaec1f433d9b1b3132a04/gatovegedukujigedoke.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///77603883185.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/mumodugabijinatemapune.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/be9665e679d33878e5d0e98f80957b15/wejapit.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/95fe3a769759de4a622490a71c66c92f/64121913766.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/10143370976.pdfIn PDF document text
    • https://pecsikult.hu/files/file/46615887491.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_off0001075f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075F 10732 bytes
SHA-256: 4e4f2462cf7fba00bfc2eb39f0d592daca56510d95e69390cf1df995ad13c17f
font_01_sfnt_off00011ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF5 17956 bytes
SHA-256: d5b50c07717085e0c5ac424282c64eb5a5bd8257a230611b59cb9664c2dbd0dc
font_02_sfnt_off00014ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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