Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fe0b00df277350…

MALICIOUS

PDF

75.1 KB Created: 2021-09-02 00:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 89dd4bf068850a87feda5ca8afbfec53 SHA-1: e719359fff204ecf15503ac0ec1048ba925adfe7 SHA-256: e0fe0b00df27735019c54ae9ae8b4a7abefbc87a22590342e127429c3720ea30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c6c481d79---16440874794.pdf In PDF document text
    • http://dekobonner.de/userfiles/file/zodosepijapisamibuwa.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/gotudibimetaxajuxiropisab.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/kiluwunopikiligekirurub.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/xepanowaruw.pdfIn PDF document text
    • http://whscardinals1963.com/clients/9/9e/9e5fab02d16e7113a74bdd4e7828f974/File/36310974737.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/52b6020ee6e192e3eb3cb3008b59a915/83613022347.pdfIn PDF document text
    • http://adasbruiloften.nl/userfiles/file/23855908770.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/8db1f03dceabaaacf7248980ac227ff8/vutokixaxepovev.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/86066377876.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/0a9ce3cf6073c21b9f45191ec5698757/51123003722.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/rodabazuwabomani.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/majurenujusi.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160e7f35bb4924---dididuzogikadanifaluda.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc4ad75bb3---63058171247.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bbb29bf98---65071912789.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160945d9b62a06---dubumogodiwemegofusukal.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/6f59dl805c1jug7fapp0seeq1m/wolifazororekalikamomobej.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160fcc229a6428---musukawatatoki.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf7b36ec25---vonubejawinofaguzupebexe.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/29564469020.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-08-04/images/files/vajepiv.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/66620135696.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/kosilediwogotuwabitadeji.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/refabudikuzulitaxanoj.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/retimiwovilikogazit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=salmon+and+corn+on+the+cobPDF 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_off0000c4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B7 10588 bytes
SHA-256: 173b023f90153a1484f179dd5c4e2fca364c23def07898eb62743372cbe39a62
font_01_sfnt_off0000dca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA8 16208 bytes
SHA-256: 1f7fd1a8d99232997990b9a94ef5c1b0f4310b9f8d6f043b2f30e218d43d6f3c
font_02_sfnt_off000105ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1