Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1699c260e947433…

MALICIOUS

PDF

102.4 KB Created: 2021-09-04 15:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2b929bc6cc5e301e83e2d2f79c882189 SHA-1: eb457c091aa5ccf4cad4b3ce1a7ba287f0200659 SHA-256: f1699c260e94743377d62848acc8191c4d53a9c6e5cda35b2730c48f803f7b75
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress upload directories and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

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://guitarenko.fr/img/files/26613702266.pdf In PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868cf02dfbc---komelupulu.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/dc8647cf0c3a4393c629be5574709c0e/gujifapapobepefufobebumot.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/h0e6c2adlj4sc5frocp85fluji/zobanaxalatofewutozaw.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/mitato.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/27025423527.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/59462435046.pdfIn PDF document text
    • https://viceda.com/userfiles/file/munemuvopofasiratugi.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1836189fa8---mupukexaribal.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160744b8e10e5e---tonejugutin.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d91a03fcc1---tudafaxajidakekironunitup.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/kesexopenenilulugodig.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/43522402604.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718dbb1a80b---64936650426.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a80f965c0---31628370356.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac19f100c16---42175394408.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fa80cee3db5---96382794682.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/46059986361.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160ba47f1a728d---jibakezaxoxaxubafex.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad77cb35f5c---balepapevasesebawijike.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/33707356993.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/02d3b0d91aae477f5506cc10cfc799fe.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/3f4801ee117d24345d3d0840daf792ef/15959515343.pdfIn PDF document text
    • http://onroerendgoedindex.nl/images/uploads/kubusisipezizabawil.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbe0491f08---52999916438.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbc53535b6---zibosubalazeku.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160df94925d754---kasodamodisaxusijavekodof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=stinger+ultra+bug+zapper+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_off00012c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14496 17756 bytes
SHA-256: d33f02aa7db272a017e00f6f30aade9aa602673bba9073d17cc5cfceb6d7956f
font_02_sfnt_off000172fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172FD 10684 bytes
SHA-256: cb602d05f3d521ac309a1da5460c03b8b69e5392b2e1d65f2c139925ccab4425

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