Malicious PDF — malware analysis report

Static analysis result for SHA-256 932e6adfd40d07b1…

MALICIOUS

PDF

72.6 KB Created: 2021-09-17 23:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cec0a174dec79fa0820d6f617a44e7f2 SHA-1: e93efc86883bc7b8e26c491fbef52779ac33b79b SHA-256: 932e6adfd40d07b131f876ad8fa1b3ef1c86d26d4de8ef22c9c98f0c930613d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS uploads, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL analysis point towards a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://lotte-ppta.com/beta/assets/file/30963159371.pdf In PDF document text
    • http://andlupa.com/userfiles/file/japuxi.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132fff49c92a---92122392955.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/difiwo.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/lufujonuvadobe.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/xivep.pdfIn PDF document text
    • https://qfse.co/images/uploaded_files/ckfinder/files/1631223879_b50ff0601e.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/tasaxanabor.pdfIn PDF document text
    • https://rafautama.com/uploads/file/bevupigafijivujunal.pdfIn PDF document text
    • http://aisne.proximeo.com/ckfinder/userfiles/files/jokonuvokasiburofowijup.pdfIn PDF document text
    • http://geotersrl.it/file/dilideg.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/48477565433.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/wubawefubujazowuzupase.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/57573181274.pdfIn PDF document text
    • https://pacientes.quiroser.com/UserFilesQUI/file/92824767105.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/norum.pdfIn PDF document text
    • https://mimpidia.com/contents/files/tofuxebuj.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143dba1ce733---nakuve.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1b1210681---nevajupazobijonavi.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161363d51cc1c7---lebur.pdfIn PDF document text
    • http://szpitalstrzelin.pl/userfiles/files/vanisi.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16130c989dc33a---jekojelaf.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/66914543558.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=car+racing+drift+2PDF 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_off0000bb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB6F 10336 bytes
SHA-256: d1c54838db5202ba1ddc8e02d34a0965629b0231ac52f62315922a95a6a89f0d
font_01_sfnt_off0000d2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B5 16484 bytes
SHA-256: 77af40435722a7af94de08442022a1fc2864c17353e82d9de445da7b9c3d049b
font_02_sfnt_off0000fd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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