Malicious PDF — malware analysis report

Static analysis result for SHA-256 493d054ebcc6f1cb…

MALICIOUS

PDF

81.4 KB Created: 2021-09-15 23:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: eaadba79cc78a72fd8ff0d693ae4c65a SHA-1: bfdf298eacafa0060ebb2e94cb8b82f711d4c6b1 SHA-256: 493d054ebcc6f1cb936391a4799b20b105f93c9e009052594194ff6b178f8692
176 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The heuristic 'SE_QR_LURE' indicates the document may instruct users to scan a QR code, further supporting a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://medvor.ru/uplcv?utm_term=scan+me+qr+code+generator PDF link annotation
    • https://bimstudioinc.com/media/files/89037995749.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/62238717496.pdfIn PDF document text
    • http://h04ydivan.ru/userfiles/file/39943185734.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/7ba88e1eafc4b3d8867d287989ca617e/pubud.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/tldjk6qnm8a5j3dmdop2g3ot76/fujosonopufejejume.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/xisafesaziloz.pdfIn PDF document text
    • http://p-energo.ru/content/file/34671835560.pdfIn PDF document text
    • http://objets.immoweiss.lu/userfiles/files/6975459693.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139fea329209---ramik.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/xujoriwitifimovarademuf.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/57932300102.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/judidizebuxirewovutimi.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/butuzotipawagevesezojona.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/97436854722.pdfIn PDF document text
    • https://aahs.givingplan.net/sites/default/files/editor/file/zidigonixiwowokuvaf.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/tigowopujusozoxuzoz.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/63756199196.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/45549222216.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/sodogaka.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/61646997325.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021090619847_762918575.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/19371813632.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/22796140661.pdfIn PDF document text
    • http://sunway.me/ROOT_PATHuploads/file/060026044664.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/39550074859.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/61748069269.pdfIn PDF document text
    • 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_off0000d9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F4 10628 bytes
SHA-256: 3d6719ac2dd9b92919e509e22a0fc9e04d3b42f1b64369e0ab205811b31593f9
font_02_sfnt_off000109b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B9 17956 bytes
SHA-256: f66f0a81d88f0259dc0ce9a280fd2aad5df2b87f1a5cb517ceea1379a48dbf8d

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