Malicious PDF — malware analysis report

Static analysis result for SHA-256 484a926047824dcd…

MALICIOUS

PDF

80.2 KB Created: 2021-09-07 14:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c4a7f6b8fbbeafd75f7a13fe9297b4fd SHA-1: b4bcac04b53c176cd75fc048d2198d4f90109221 SHA-256: 484a926047824dcda78ae4ed0436a924f7c2a2dddc984cc29a58ddb1a499c0a6
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The document body was unreadable, but the presence of numerous external links and the high risk score strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://1day2night.com/UserFiles/file/vujipozijox.pdf In PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/sgvlg8nqk46mug3qflbibcfqh2/mopaxuv.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/68244112472.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/fm96027gnr4iqh6a0i4c3a146d/vudiw.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/62033273679.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611758d46bda7---23301715169.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/5198747410.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/2137045336.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/widamonuviko.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6a20a2e07---bimosepotafe.pdfIn PDF document text
    • http://ledson.ru/upload_picture/893790358.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/fd420fc3edafd61f6a90e91cfe353262/30577766990.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/0hot132a81pbhkmh2gv1nt2cr4/kuruge.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/robipogedariwen.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/2oo67f9us4cs1nr50m7smdatc4/paxusutip.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/mejakutamolu.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/dalepukapomor.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/162e8b76fcdf08892a54df09f95fa07c/67467968285.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/29009380522.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/65676176693.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/vawobajabedateku.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/repalikopux.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/91140600885.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/g2j9c9t18r8m8jt4cg5sjg37e4/31239220819.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113f8b14504b---25062943266.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d0ea25c2e---zipedibabikuzezes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=pelengkap+kidung+jemaat+pdfPDF 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_off0000d87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF090 16064 bytes
SHA-256: 091c0f884c372b10d334c21869b4a3cf8f036427286031ab7cb99ddacce61a81
font_02_sfnt_off00011a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A36 10776 bytes
SHA-256: 0956af88a664804e438f4fde4785d89ac8bdc7f781bca6f6fbbb59d5f5e6b57d