Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e532519f6222bc2…

MALICIOUS

PDF

79.5 KB Created: 2021-07-19 17:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 42466af0c6abeacfa10bbdef95c42415 SHA-1: 366f8dab3208b59d7866f170802887268fc892a7 SHA-256: 9e532519f6222bc2dd27ef900a239d0649e63dd1b537fb10be7d673e3cb3e1cc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm directing users to multiple compromised websites, many of which host other PDF files. This pattern is indicative of a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/d17273703ed39ea6cbce8dad547534d0/xojenuledimedis.pdf In PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/a43ca0e1df6986d0d099b193dfe66dfd/marovipezobebosa.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/28754215713.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/37544348954.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/notujijesupekuwiw.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/982eb6304408a22a8d942238275f59de/5997582238.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/26dba367283a20af6dd4eed124780b1d/90213525932.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/565ac6c6f0f1f62a907e51b3dd2ebf27/rorofukapawopekujaxoxubu.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/rb4165mrstl4nn7tmfnd30i7rt/xigovojozag.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/89f8986e39dbb6732deff8c2d81dc448/rodosefuxovuramuraluguzu.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/ha4ha5mpv1ij49rto6omps3vka/gejip.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/8f44aa2fefe08a838616681bbabcc93f/11761248026.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609db5cda16f8---molalamakisujexovugorome.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/27ce2f3885ede07781ef75c971db38c9/zufaroturo.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/ginowudogazut.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ecfb12df7f1---gujiwilomokesana.pdfIn PDF document text
    • http://medica-brno.com/files/69157093452.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/fbb53f2702b4b93aa055461aee3a80ec/51123930925.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160730d7bb7fdb---dafudumizinebikelopuj.pdfIn PDF document text
    • https://clubsportedinburgh.org/userfiles/files/75506827636.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/0si1lt28m8bjkekofmqqq3rgm7/zanit.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/98950900859.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/5743055576.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/seniruxawezabovusurizeka.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/67641009293.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/87f965145032758be7d235b3b9586cf6/xufufozokugemavinaz.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/29892581613.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=english+for+international+tourism+workbook+answersPDF 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_off0000d0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DB 17288 bytes
SHA-256: 501a8bbcf0d90ca6916f47a2cab8ae8f224daaeffbd3f3654bd5d5dc8c07ea32
font_01_sfnt_off0000fe7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11696 11064 bytes
SHA-256: f948db3b436f275c6a52bb99c3d9364b56ea053c59287a6868533a04afab4e55

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