Malicious PDF — malware analysis report

Static analysis result for SHA-256 097e3ca84e8acfd4…

MALICIOUS

PDF

86.0 KB Created: 2021-07-18 10:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 3f722257b77ff4a951e67b705e4a40bb SHA-1: 47a34cf5e4786a789eb6ac6c27e72aeaf557960c SHA-256: 097e3ca84e8acfd44c9826554aa7171c854d62cdb527708f4d15921b1bdce5d3
156 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites, which are likely used to host phishing pages or distribute further malware. The presence of multiple unknown URLs and the 'link farm' heuristic strongly suggest a malicious distribution or phishing campaign.

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 http://rgjbreunion.com/clients/6/69/6950e03db8b1ea894755b369f0a03c31/File/sugufupif.pdf In PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/budebulikisunen.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/31762896577.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075be2bf0ffd---67288932068.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd72d596d8---64952520830.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609c086ec5665---66109383081.pdfIn PDF document text
    • http://tulsamemorialclassof71.com/clients/84987/File/luwoxefazodirowet.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/d6402ffd934157f45669b4a29fc4fd37/31923751635.pdfIn PDF document text
    • http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/32101498556.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/76587168585.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/xatolupajesugiforig.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/mezamevepenaduladopalaja.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/793ae724527770bb5dec248b6e09ff7e/96107146189.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/ferakina.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef224bec38---25488439337.pdfIn PDF document text
    • https://foulardfotografando.it/file/xibifib.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa03c07534---mokowetikamolewuwunudorog.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/97391825f7a02403799019f86e5d3b8d/40444043236.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/39308154725.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/c0ff722ee00291c3e79af6d0dc63fd68/92984232739.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d60eeb773f---dorobezebojelakagob.pdfIn PDF document text
    • https://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/60396898393.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/74397191129.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/49338234898.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/66346124191.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=base+10+to+hexPDF 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_off0000ed43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED43 10192 bytes
SHA-256: ac2cbdad6a65a169bd6d51784a8c076fd06115eb7238f41d4fe1c960d73122ae
font_01_sfnt_off00010462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10462 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C74 17680 bytes
SHA-256: 5400183471a7cc4af7bd8d20785b61999f7cb791a30fdf8138df672485506ecd

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