Malicious PDF — malware analysis report

Static analysis result for SHA-256 9368a9d81b6ab473…

MALICIOUS

PDF

83.2 KB Created: 2021-09-21 16:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d68df26a9624341a428b728c34ccc67a SHA-1: ed72810cd53752a5f54f4719d4d83c02f0a57f1d SHA-256: 9368a9d81b6ab4739ee1e311d7cdd115dc413947b2d0d14a3ec72974f95393c4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, and one specific URL that appears to be a lure for downloading a 'hacked version' of a game. The presence of these links and the overall structure suggest a phishing or malware distribution scheme, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=download+shadow+fight+3+hacked+version PDF link annotation
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/161497ce56c22d---vutemokefelezanova.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/kunafegimufumomerutakokoz.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/61069850542.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/zefulonamuborilivowenite.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/94374946602.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140dda40e408---80282220338.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8917c683f131fbab85b1d64e28bdae9f/wemamore.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/38271358573.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/8945928266.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d05b18d795---32420493247.pdfIn PDF document text
    • http://servmed.net/userfiles/file/1229990704.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/80016346771.pdfIn PDF document text
    • http://unseretochter.ch/images/file/kugururijigadudelov.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/nozifiwuxuk.pdfIn PDF document text
    • https://pesonabali.dswip.com/ci/userfiles/files/86199800217.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/41289192230.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/64937635461.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/lotas.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/sexinuruputix.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/7b638e753cbcd0bf7b98e22791eef066/wifamitifetip.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/71876836037.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/37627424178.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/93043394222.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_off0000df33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF33 11172 bytes
SHA-256: 5804e834e4b4607db3112c52b9a7cd3437467afb213123a124bc187803c812cb
font_01_sfnt_off0000f92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11140 17708 bytes
SHA-256: e636fbb2dd914120baf9f63180701be20d091b0d79c85ecca6d6f34e4cf89327