Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dabfbd37eaacd57…

MALICIOUS

PDF

75.5 KB Created: 2021-09-15 15:35:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b5b257622f8acef075f63717bca4eb67 SHA-1: ae26790d816ee1c634f7978ab5182a87294a6bc5 SHA-256: 2dabfbd37eaacd57f9ba5a4712a4b158538ea539afb88ea8878938136331cd38
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including links to compromised WordPress uploads and IP address literals, suggesting it is designed to redirect users to malicious sites. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the conclusion that this PDF is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pixomot.ru/uplcv?utm_term=current+version+of+android+operating+system PDF link annotation
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614141bc15a34---40002741465.pdfIn PDF document text
    • http://industrialdevices.in/uploads/80708428959.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/84436538119.pdfPDF link annotation
    • http://dvg.asia/ckfinder/uploadfiles/files/livinutovabipugosaretaji.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/dorumipirurafef.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/32186250572.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/virogawozar.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/xagulabukafewojoxenujuf.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161322412089d0---26335535354.pdfIn PDF document text
    • http://ls12368.com/userfiles/file/49982184549.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-9-13/20210913063030341119.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/xelogerafujevuwexesak.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/kadepewakobibojelijewi.pdfIn PDF document text
    • http://sudeoksa.com/userfiles/file/20210905083458.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/89519819550.pdfIn PDF document text
    • https://konzolstudio.ro/uploaded_files/file/fezakirapenoraki.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/zigixuxutunij.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/gimomuxe.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/36290865597.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/zetuxamukiretumigogujejax.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613b73063bad0---xisabowokajo.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/12620657527.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131506a3e469---jojiboteriwobideruwu.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea1e629b27---lupanojexifiza.pdfIn PDF document text
    • http://aotem.com/data/home/qxu1780220113/htdocs/uploadfile/files/26564984032.pdfIn PDF document text
    • https://thebillionbottom.com/business_school/uploads/file/midumimaf.pdfIn PDF document text
    • http://technocom.pl/editor/file/64920415930.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/m14cfkad05d8b2q08j2pdtfda5/rowemukozatokasubexatu.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_off0000c0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F8 11104 bytes
SHA-256: a02efb15f97a7cc264cad6b60479d619698bc5b84bb56c8af3522a00a2c9d614
font_01_sfnt_off0000dabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CE 17952 bytes
SHA-256: 24a9a21c1a5dafbe3f8e396ab24894c254d3d5d95127403f7117783699ce57e9

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