Malicious PDF — malware analysis report

Static analysis result for SHA-256 01750447ac890aea…

MALICIOUS

PDF

83.0 KB Created: 2021-07-07 06:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bd16f395b04efb61796bcc947add5aec SHA-1: b635a4636cc46c5f3525a3db84e6a39d0e020185 SHA-256: 01750447ac890aea49f0573536110b289d35555a9c8d8dc8bb247b4ced9d6bf5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of links pointing to various websites, many of which are hosted on compromised WordPress installations or disposable domains. This behavior is characteristic of a link farm used to distribute malicious content or conduct phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://garglob.ru/uplcv?utm_term=pint+is+equal+to+how+many+cups PDF link annotation
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/dfbae8e8e379d34b04e13de843940e3b/40893211770.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608626324e9be---votoselivurutaxagegon.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/90587468874.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/8a4b1d7744721291bd84ac050e6995ac/xukikexewo.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/58753735779.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd70e0e437---37727410417.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/6878338013.pdfIn PDF document text
    • http://zuche0551.com/upload/file/56701020280.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/nixixuzagosonire.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/f74c1080c97f5904b0188ec78aa28753/42937720384.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cb3825cf8---vipuwuxuzonobixofawexob.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608150aec4a09---77761774030.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/bexaduratofanutenakonesej.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b18a10e44---xaxovigekejegulakape.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/27ef69bcadc3b4dddcba96c8f2994900/kudodexuvutil.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a89c2a6b906---jupupidukepabuko.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f43b9306fa---35188131089.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/rurobebetigedul.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/65038805506.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc458bafd8---sanitedagezax.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073fa99e146b---lojivojatutag.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e2dfd84481dcad5670e2a968a3aecc5a/80102662078.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/ed516db82ab9ea04c308c7f8155c1ddf/96868105670.pdfIn PDF document text
    • 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_off0000e262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE262 16464 bytes
SHA-256: 80c7cdec904b1df63c2a15284b470dfd68e6e8be54dc8070de1743a7a3bcb5e5
font_01_sfnt_off00010d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12554 10984 bytes
SHA-256: 030a86017201daa582e8333e600539c6cbbc0e29e514cabf649a8f0ec0bd4d2a

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