Malicious PDF — malware analysis report

Static analysis result for SHA-256 74934c6dba5869a2…

MALICIOUS

PDF

111.5 KB Created: 2021-06-27 22:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a5b841e59d4fd49148428a6ed322ccf9 SHA-1: 43aa5fc5caa0bd7f7b251eb0cbb27b4789545228 SHA-256: 74934c6dba5869a24be856672864209ecd93f9d14a6ebb67b53769eaec28c237
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or redirect users to phishing pages. The document body is unreadable, but the presence of numerous external links and the detection results strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9c5c8efa6---rakafigabosowibonelakemov.pdf In PDF document text
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/nowewizitixowejige.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/bd7c4bc0de9e559f4ab451e385186876/buzejiwolox.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/fewisa.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f74c0b219---43327890437.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/98209722197.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/67849530001.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c50cdff3d99---nujunijuwajusaterona.pdfIn PDF document text
    • http://tfforming.ru/d/files/dixadapuk.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/f2d6b69a1ab5430570b3cf753d7fc02a/dipoxuxuzupolapulila.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/ef2d38bf1ffc4994311fcab73c2286cd/vobisapebedijugasivubomu.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/46c624e8e441010c04bd618eb51a5704/2799474753.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/ntrc4eka5l266ge3k25oil6118/16715249159.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/78204478351.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726b8e7309a---gakowopo.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/40007618002.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/87417179828.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/22524142190.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/baponawupadu.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160af998acb2e9---fafoj.pdfIn PDF document text
    • http://teresachild.com/upload/files/92556799567.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/4266738268.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/k22vmt83guosi0jl5o3e3d84si/86167964683.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbe08ca29d---wirujomomavijofiwuveb.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/gokebulasiruzekofifaboguw.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ba627b0f3---65636154064.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=where+do+we+go+when+we+die+yahoo+answersPDF 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_off000151a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151A7 10576 bytes
SHA-256: 165b9b4b7aaded09b26bc85585d1a19b7c1555b98253aa98b3dee85b150ddd4a
font_01_sfnt_off0001698e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1698E 17864 bytes
SHA-256: 449e33538cf6d9f0e86f537d1538f0d05f8417783a10528560913cab72cff5b0
font_02_sfnt_off00019865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19865 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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