Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34de75b7abd3d07…

MALICIOUS

PDF

76.6 KB Created: 2021-09-04 02:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 301c7dd6865de83cd8f79e6a0624f32b SHA-1: 455b89d0fa539dc82c8267fed5eb893c3a292059 SHA-256: e34de75b7abd3d07a42744a3898874825adbcdf8dd45ee912d1551e7331f9064
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160dcbde1deea1---vopogugaximafe.pdf In PDF document text
    • http://atdawnwelift.com/userfiles/file/gimomorexunifodoludar.pdfIn PDF document text
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/58996547717.pdfIn PDF document text
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/rewakikusonapafe.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/11819524949.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/wujir.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/pukat.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/14947210174.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/a08b2faed25e591b36e26e285ce58edf/26682487891.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/2125fefc7a4b6e67baa469f311a11a1d/danisedefumiwusedituboje.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/44115407739.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f34b4213d1---58215505150.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/78737068027.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/4fc75c1766c1759ad78086f148938e89/5138758621.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa4e6c52e0---54870464912.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202108241759485054.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/gibajirufetate.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/kosuvuxoji.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/defanamaxuwulijetonegele.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cb8d836c3f3---77685783482.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/0ea6c86aa78da824caa01028743f8dda/11096782436.pdfIn PDF document text
    • http://targdenunti.ro/userfiles/file/78396171230.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/gedewegimapo.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/89109829012.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/73acad93db54e8fe61508a3482e1d6c0/56872019071.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=tp-link+archer+c7+wireless+ac1750+manualPDF 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_off0000c1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D0 11056 bytes
SHA-256: 557ed984f7ac48dab35e4026c2bbdf73c1618d989639ea1817f75c820a40b6f0
font_01_sfnt_off0000db95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB95 18312 bytes
SHA-256: ab7f574038a17e10c523e22da1994c619f6d61ee29bafd25cf01253efedb8c32
font_02_sfnt_off00010ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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