Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e49de1b6e969755…

MALICIOUS

PDF

75.7 KB Created: 2021-11-14 14:07:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2de2e07d73f9e465b689bf5e8cc702da SHA-1: 7c6cf3b24bc2f174171d47b27772ec3af951a2c7 SHA-256: 0e49de1b6e969755130cc505dad11f02f3063197444018f5ef71678d2ff32d3f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://wroclaw-effatha.pl/grafiki/file/22086065151.pdf In PDF document text
    • http://test-immo.com/file/21526788195.pdfIn PDF document text
    • https://ijp2.com/contents/files/zuvikofozixurunavujabus.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/mugusironisufapexekuda.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/96610427208.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/55367914384.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210924190833152.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/tedodurabufaz.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/17224361831.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/wogoxezokatov.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/dajemoma.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/xarezogunemitukoj.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021101923100173499.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16146cb9797c9a---514676431.pdfIn PDF document text
    • http://3dtechgroup.com/uploads/image/files/nomunevalopojakilapeb.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/gimuwugagabujizodalatoj.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/sizedunonugewemaka.pdfIn PDF document text
    • http://agavietnam.com/img/files/vufesumiramexowigix.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1633461223.pdfIn PDF document text
    • https://tahi.hu/ckfinder/userfiles/files/77442073067.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/85809648565.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1617acacd4f2d1---fixomobowejowotala.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/5022311345.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/2I9n2o-U8HI/uplcv?utm_term=dragonfly+in+amber+pdf+downloadPDF 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_off0000bfc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC9 10916 bytes
SHA-256: 5d54161bba3b8591cb9a872bc5979c11b202acf7e562d82ff6bec1e4b9208eb7
font_01_sfnt_off0000d897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD897 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_02_sfnt_off0000efb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB8 18748 bytes
SHA-256: f3c53da3d72418cfaed22bf4bb348668f63e7426fb99748b835b2786e5863c68

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