Malicious PDF — malware analysis report

Static analysis result for SHA-256 2207ac6a7315f910…

MALICIOUS

PDF

72.8 KB Created: 2021-09-03 02:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f577b10cb34486fb553a8acd0c47aa30 SHA-1: 8d9acb60ee37fb830edd0538bb713e5652d2d0cd SHA-256: 2207ac6a7315f910487902a5b53a4f379183fee5c7215e74c0de601f30913e65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links to external websites, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/nivobidopupaxus.pdf In PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160950bf9ab0b9---lugadinujisizog.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/c2f571fbe7e28f775ca3188306e26a2c/36040849105.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/rovinadiguketesuluwale.pdfIn PDF document text
    • https://satesayap.com/contents/files/rivebekon.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/8db2bfff8b64e340794ef6d1f384add7/96183960764.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/xetoxopavimitema.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/c030d48b05d19aa8480216ea1046425d/82523367690.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/rabanozutujukojuxevazeti.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/zilamasawobenofozaduw.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/xometivusukipejebirexezi.pdfIn PDF document text
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/kudug.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/kozapalokikedut.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609eae150a99c---zuwesobibegizikeli.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/21157372621.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf1eae3192---47523105741.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/ee361d844431f2ab6e20cc4c6beb1ba5/7097310818.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/16578995268.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dd06e6b75---zonuw.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ac3d1e466---19951794418.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/ee18a20ab22fbddf43adeeb31595a701/zowexok.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/37684037359.pdfIn PDF document text
    • http://wwstationery.com/files/file/gevakuwi.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0903defaf---kugogogubigamipo.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/mijuromotodef.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/pufuporazirazi.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/29893382375.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=implicit+theory+of+self+esteem+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_off0000bb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32D 16276 bytes
SHA-256: 22930685ec37be51a98bf957eecafc5a1b99fb39ae727d22e39bd4a48426032c
font_02_sfnt_off0000fcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB0 10684 bytes
SHA-256: 61f221078f9f11fddcde604e6f3b767b890369599ce27c81a73888442cec2911

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