Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c1daea58e2585d…

MALICIOUS

PDF

84.9 KB Created: 2021-06-30 15:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 3c02441415af50a0d4be4307e15abe6a SHA-1: 165d0123512a8543327a6fd0f22ba8f0672cd301 SHA-256: 88c1daea58e2585d2c3501b6cca17c7b14da72d665406d1a7deb1bde58dab860
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a link farm used for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://nomylo.ru/uplcv?utm_term=direct+and+indirect+method+of+teaching PDF link annotation
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed08c105f1---91031862257.pdfIn PDF document text
    • https://datajournonepal.org/files/50106113863.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/hjm5lht3v0p1bnsclaf6obe0q3/46884475468.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/6163fa1505be7df4df5b98271bd07dba/56915854340.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc5c60d97c---19912417788.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606d431874c14---kapesijizupujanusexuvura.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/d8678cebf409715a1b66b40239cd26b0/73190785666.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/zaxax.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c82afe66c0---subeteduranaluz.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/panipeduwifevulatedererux.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/44638126442.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ef12a4192---95327071313.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/dupal.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/zonodifewubaben.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/kezisadokuzevaz.pdfIn PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/95473519986.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/1166762893.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/n4m9h0sksk19pah77kv048ba2s/xifex.pdfIn PDF document text
    • https://faprosid.com/file/96671368131.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32832895963.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/47708896438.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f8b75e523---66322877685.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/d6e3a16b82ac43ea70a215f8451ac0e6/kejesataguwavegerixadem.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_off0000e5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C8 17608 bytes
SHA-256: e8b9cab174830790b6f5784206e8925332564d1b230df694af3ba569dccd5352
font_01_sfnt_off00011468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11468 10712 bytes
SHA-256: 0180b55d90e4fb413982a4c62db07213182281b51bfd49c432db3c2e0a7dba96
font_02_sfnt_off00012c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.