Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee80e1895c91844…

MALICIOUS

PDF

78.9 KB Created: 2021-09-04 17:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 343460048e5e7d166eadc505b6e5cd58 SHA-1: 82c09a35fb14ecba0611b281748c347a96af13b6 SHA-256: fee80e1895c918441d868e3a4488c855c6cae964b8c8a701bf9be6fd6d1f4345
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a phishing or SEO poisoning attempt. The ML classifier also returned a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://m-s-g.ru/userfiles/files/78117010804.pdf In PDF document text
    • http://frangarcia.eu/upload/file/30209343215.pdfIn PDF document text
    • http://doingthing.com/downloads/blog/geust/files/gopivebegoxa.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/nolaloxifemojogeguxi.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/vanori.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/73319549953.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a333f4dd0d---4637480557.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/1c6a64778432ff26aa82e46c1a9d8a2a/ketusujugesowo.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/73744684414.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/parawokodini.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/aae89e776747df05911ba87500222c38/86370199901.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/11766447005.pdfIn PDF document text
    • http://www.proyecpapel.es/ckfinder/userfiles/files/guberodurakibutikixi.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/ledadexujogonedexukuda.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e92df064cb1---10950557681.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c12f59ee09---sesovuturewu.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989a5d82920---zofadokubigolikarufugus.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877070047c2---tinogudezexuzuk.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/85058248873.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/kuxixanigalinebebavuzes.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/aeda432dbc4c389a21b83d3ef6c7fbd1/sodagobanasu.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33930825990.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=simpsons+family+tree+worksheetPDF 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_off0000cf8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A0 17348 bytes
SHA-256: 38e144fe479e55ee746d7a7ee259478a55e966ef057d09b5e0017739820862bb
font_02_sfnt_off00011445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11445 10988 bytes
SHA-256: 6363ac94175c8977ba98aa1936318f65ea58689e6eed15714683b8d7c057df0b

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