Malicious PDF — malware analysis report

Static analysis result for SHA-256 514e22074b0182f9…

MALICIOUS

PDF

81.7 KB Created: 2021-09-22 18:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5b426e57e8f7927d7d213314e32ef95c SHA-1: 876c5fc0b1c427981fb3089af7a4122c90c7c271 SHA-256: 514e22074b0182f9190ddc776e234b1b168a8d3f5c9d6e4c1df2873f970e7bac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the URL analysis and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://hbphoto.ca/resimler/files/59701275491.pdf In PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6a149656e---62136653120.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/69712097003.pdfIn PDF document text
    • http://showdoimovel.com/files/files/48077686775.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161494feb06b75---44990395535.pdfIn PDF document text
    • http://mfcpavpos.ru/file/26735734031.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/96712975351.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/43969097789.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/wuliwibuzananaridotiv.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/66810311894.pdfIn PDF document text
    • http://tucsokszekszard.hu/images/news/file/dafinolawatigamebexa.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/2018120236.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ki6dqqas7uesi64vluq4m75g10/donikekupefogajuze.pdfIn PDF document text
    • http://shouce-image.kuchuancdn.com/Public/resource/files/51706054789.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/62e9cee2429883d78b1d9421eeb86f9e/wefuxenipabid.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/simakigideniwekuxojer.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/385661758.pdfIn PDF document text
    • http://theseadiaries.com/ckfinder/userfiles/files/lejakadivirexelifij.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/20872765730.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/jigusoniz.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/laxugepevizofeluli.pdfIn PDF document text
    • http://lifecontinues.ru/images/files/zofiwazowodajupewafepazek.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/57693146611.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/89461769194.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=shadow+fight+2+special+edition+downloadPDF link annotation
    • 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_off0000da89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA89 11080 bytes
SHA-256: 8d5013d0222b4104f8bff5ce6675331daf177268a68fbe0d646ba3ba69ffbee8
font_01_sfnt_off0000f43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43C 17160 bytes
SHA-256: ca1115e2c992b9134fa4414bd218440a40314a36930deba717ce2800d436d05a
font_02_sfnt_off000120da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1