Malicious PDF — malware analysis report

Static analysis result for SHA-256 530ae4309255c312…

MALICIOUS

PDF

70.1 KB Created: 2021-09-27 20:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 02bada0d1632918381fb14fb5386f826 SHA-1: be5a92999a2016c21dd7a93a20812aa7f8242f00 SHA-256: 530ae4309255c312f93b7bde1e1331f6992e6e33078bbddda983414af7a17cc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed for phishing or malware distribution. The presence of a link related to 'adobe photoshop free download with serial key' indicates a lure for pirated software, a common tactic for malware delivery. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://globalcentral.net/contentupload/fckeditorUploads/organization_/file/sitegaxa.pdf In PDF document text
    • http://modaxch.com/userfiles/files/48894783067.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/nafemese.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16136aa3c0dda2---winawejoditakirukijoras.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/2465774f5ec13b547199076ccf3ebc8c/ziwuxerazawexasat.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/vafodixal.pdfIn PDF document text
    • https://vietcuongcorp.com/uploads/news/files/dogevepado.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/tirumedebejug.pdfIn PDF document text
    • http://www.centralperdana.com/file/zuwujegolex.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e581617ae9---foramavufidudira.pdfIn PDF document text
    • http://usateatop.com/_upload/files/wopopoborizumagopef.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/85060472644.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/81978686953.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210923_944C47959BE95CB6.pdfIn PDF document text
    • http://samafb.org/uploadfilefiles/14080788423.pdfIn PDF document text
    • http://maysoi.com/hinhanh_fckeditor/file/dobajanevojokumuga.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e74a8409c6---fofezafenagesidazesixugax.pdfIn PDF document text
    • https://friendsofmultisport.com/ckfinder/userfiles/files/50821879190.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210904153416_gj3335.pdfIn PDF document text
    • https://patriciogaete.com/upload/file/pobedoxidupuxo.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/fubagexemat.pdfIn PDF document text
    • https://stvorki.ru/files/file/zasunabodozoleroriridadoz.pdfIn PDF document text
    • http://furniture83.com/upload/files/sazenelonupigivovefogara.pdfIn PDF document text
    • https://pisangmanis.com/contents/files/zatafomivokut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=adobe+photoshop+free+download+with+serial+key+for+windows+7PDF 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_off0000b040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB040 15944 bytes
SHA-256: a42b01c31a2f1c5728b54c5c6d5aac9922cd4d2fb9b91ebdcf6dbaf3343dd274
font_01_sfnt_off0000d897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD897 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AE 11056 bytes
SHA-256: 9f3641d831fc8dae13fd7936820e621a945f50f94eabf6a87db5432b3c77d37b

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