Malicious PDF — malware analysis report

Static analysis result for SHA-256 7180742b8f244d16…

MALICIOUS

PDF

107.6 KB Created: 2021-07-17 15:34:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6d271de9fbdef1b6dd7668d7241867ff SHA-1: 0dad3c8785e9108a8556fe43667338cef3ce7631 SHA-256: 7180742b8f244d16a085d6a925a32e2bf07200edf09fca5b40817abd2053c04b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, indicating a link farm designed for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents attempting to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://altinay-law.com/images/file/luvenuvegegobevizumujom.pdf In PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a03456e2cb---70049258839.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/sog9i96sh04n83dtbm6lr5t0r0/39643601601.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071dba43fe02---23742464795.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/b56d6875a4a80b09f78773a0c7bcc0f2/perusazoxoninekugoke.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/tewexaputowuwitaginisib.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec981ad9678---bazokikubibagobojomat.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04564800d1---barokawubugetibixavovoko.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/e21bc9d3d01a10555b04b9c9c66836fe/18919364574.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609491cc86d26---zajofunububuna.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/33788580588.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/75318481530.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efae1e2251---jawepubuzufabijewugo.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/jopojaxabeku.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/7492328605.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/72999302578.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/11299492736.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/d29dfc382a30ac13f9de457fa219ce73/88583114144.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160782f6b8c003---70526936292.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/funufepuruvivakubaruwova.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf897e3343---87757990948.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/04349bc747ee01ef3abe44133d43f13b/refupekixosifiduguvi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=excluding+the+jokers+how+many+playing+cards+does+a+standard+pack+havePDF 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_off0001402c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1402C 11632 bytes
SHA-256: 45ebe3ba95f920e27eea774b2de9d98e13e1733a3b69195c2419f584e83b181e
font_01_sfnt_off00015b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B80 17176 bytes
SHA-256: 3a3c186c4e45c28b0cc8da42737ca318c5fe0fab57c0477cdbff2057b588f27a
font_02_sfnt_off0001883c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1883C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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