Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d17323b99654e8…

MALICIOUS

PDF

85.1 KB Created: 2021-09-18 14:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1a64a2ec1539de8c6d4235a34bb8c99d SHA-1: c5629aeb10eb2e140049a124c188c38727f6d711 SHA-256: 04d17323b99654e8abe3fbb727163b854835c6d97b31db8f04e4a8c18bfe2838
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with one specifically using a UTM term related to popular electronic devices, suggesting a phishing or scam lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links pointing to disposable hosting, reinforcing the malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' further confirms the malicious nature, likely involving the execution of embedded JavaScript to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ketchas.ru/uplcv?utm_term=amazon+firestick+iphone+remote PDF link annotation
    • http://www.gieskestukadoors.nl/ckfinder/files/files/baxiju.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/76309743338.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2021911045363309.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/10580057906.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/16097772432.pdfIn PDF document text
    • http://blgjad.com/upload/files/98108462589.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/66933115678.pdfIn PDF document text
    • http://mega.kz/media/upload/files/merodatijuvefatapara.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/rotatidiken.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/24019080921.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16134ed3ec964b---deposuvojutanuli.pdfIn PDF document text
    • http://langmypham.com/luutru/files/56373436809.pdfIn PDF document text
    • http://decoworld.in/dayafter/uploadimages/newsimages/file/86533407596.pdfIn PDF document text
    • http://theexplorerthai.com/userfiles/files/bosibagum.pdfIn PDF document text
    • http://ifap.it/images/file/tutitaxudewofenerinijage.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/mutopefafunozakosira.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/7752807840.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/15804591073.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/25071888486.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/bazelivadanetisu.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/87a76e6fc9f909325409156f5c4d4db2/44183262234.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/93236858550.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/88274140446.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/23130038495.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_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD97 10832 bytes
SHA-256: 3a8b420169f8bb492dd504e8556de99ed05ec852c9a33f1844eb92ad701b345f
font_02_sfnt_off0001167a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167A 18460 bytes
SHA-256: 36882472c3c2b6e55e22e9319b73ef5caf7295cf8331bad66fe270397e9af3ea