Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0888ec197050d4b…

MALICIOUS

PDF

97.4 KB Created: 2021-07-16 19:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 7b0e7818281a20077461c6ef5f43196f SHA-1: fb9bc5cdc8a8e7753b0b0e44bca57a5fbb528592 SHA-256: d0888ec197050d4befe1dd4948722d0aab18d08e33f3943d4e5eb651c3bfae47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan variant. The presence of numerous links pointing to compromised WordPress sites suggests a link farm designed to redirect users to malicious content. No scripts were extracted from this sample, but the PDF structure itself is indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e20aeed528---vikafefeduvuvumu.pdf In PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/3132e8ce4c6a7dd08c9796d118af77af/mopidafitarubeleru.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751d8197cb5---lojokedolumirolakis.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/t26qvha75js6k377jh19g1qctj/61247296363.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/wilaziratufipojerelaz.pdfIn PDF document text
    • https://t2sc.me/userfiles/nozarume.pdfIn PDF document text
    • http://phs60sand70sdecadesreunion.com/clients/880504/File/didovilaxud.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/petedud.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/6c548a04217b843bc43204865941e47c/99690856239.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab2f98ec6---77448029756.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a9fa603a2---saxokuvipatixiganadidelap.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/98c7ae749358697d5fa49bd767c744dd/meluvoderamib.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/fowepekanonosel.pdfIn PDF document text
    • https://landi-bg.com/images/file/saxaw.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb07f62b4fc---91412507920.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210605072418.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/b54ubsi8v9f7vljc824im6boup/14070550542.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/198f049c5be932888ed892c45c5d6568/kevowu.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/85774353740.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/figin.pdfIn PDF document text
    • http://mopron.ru/upload/files/xorebigonuwupurirugewodev.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e386aa384---21055141622.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210609215006.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+the+answer+to+a+addition+problem+calledPDF 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_off000115eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EB 18208 bytes
SHA-256: da6a29f8ecb23c3af2a25842df1e0d2b1bdf51c9711f35c20f10461bddd6e064
font_01_sfnt_off000146b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EC9 10996 bytes
SHA-256: 9541e8eb9663e2f33705e0bffa105f27885c6655a6fbca1f939a5bb8fc1dcc26