Malicious PDF — malware analysis report

Static analysis result for SHA-256 7522677f49f188f7…

MALICIOUS

PDF

70.9 KB Created: 2021-08-29 18:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5a9b7704784cbce9f51e890e689a169b SHA-1: c44b178f3a45fa3428644b2599856ba478e2bcb4 SHA-256: 7522677f49f188f744977ddacc1c09123a73bc0e21d94da22f502fa4005a30bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of external URIs and compromised CMS uploads points to a tactic of leveraging external resources for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=clash+of+clans+coins PDF link annotation
    • http://arohitourandtravels.com/userfiles/file/wumimuzujo.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610a2e55130e3---watak.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/41060892e2ff21b0017fa4b45e9bf86e/fitejew.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/nivisawa.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/89146197455.pdfIn PDF document text
    • http://lhs75.com/clients/46937/File/vudosiwaso.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d5e9eac2f---dufuzuvuvatod.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202108170608038499.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/ca2c61eee4ff1b0098627577dd6025ab/girevasifaki.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/rogasamimej.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/dl99svvlvf6q82r3vv51nev5v5/91897674107.pdfIn PDF document text
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/juvodurilonid.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/48498542715.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610ce655dae2f---29080420160.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/6bejssuncol9vt74j3ddkecro6/putotagikuvonusije.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/fbvv75ffmuvp4b2v79gk9shi48/12653262035.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/28451642890.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/31418143454.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a06bdd71225---25404760367.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/rubatopepakizafakexikote.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/82865230762.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/lopakidosuxivobezapi.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/qstho6u7f972vd43vsc4uh4ns3/73590388279.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/52769485677.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_off0000b4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F1 16048 bytes
SHA-256: 75b8536d38a31691b80e59b97ce14e470596b861ca6af5beddbc2b842709936e
font_01_sfnt_off0000ddff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF616 10136 bytes
SHA-256: 291558dfacdc89f5965c26bddf4c19600aa5fffd53d5c42ac42c850f64831ad9

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