Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a418421d30fb24…

MALICIOUS

PDF

77.1 KB Created: 2021-07-02 22:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 06a22bc82874220ea9ffe535999a1b49 SHA-1: cbf4de2911f694d7173d53afbec19e18a0aa84bf SHA-256: 29a418421d30fb2419fc8525875b3aefd0386d95d63ec629d6fb9ebfcde45ae4
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://chcial.ru/uplcv?utm_term=gold+coins+of+ancient+rome+crossword PDF link annotation
    • http://hifi-markt.org/kunden/kronhardt/ckfinder/userfiles/files/revipezebilaziraxadatuxi.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606d39edacdb9---86725084943.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b1409e1bb---sawaxite.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/edb259376aba3ef8982245bacb2af40d/wewetomaxonajen.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/silub.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2cb79ce3b---76359410873.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/96b0114c71fb15438e1425c621213d65/xitaralusutixabarifu.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/90442439871.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/tetagojijekotuxovo.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608525caed92f---nexipewuvalorebelewevi.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-4-30/20210430202802700653.pdfIn PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/4ef19a16addf20b2da59810d5c825f6f/zujiwarumexifafujotemibi.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/jjji5563j9fl6c5igfd68ivf47/fesogegowikudavu.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/2dcd7eb92ce794bd67b2a21cf0cd2a99/61505189009.pdfIn PDF document text
    • http://rts-3.ru/upload/files/31473257967.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/14668094996.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/79028026660.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075647ddc750---mabire.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a1c740b5b---92558034368.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/35755986342.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/c85078e8d418aa185e5c2ef478f16fd8/kurux.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/lezimidakoko.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f636ebf367---19980497125.pdfIn PDF document text
    • http://d4sontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/buzojemubavo.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_off0000cac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC2 16712 bytes
SHA-256: 0532e1f11cfc5fdddedd38b0cb7bda1b93f3051df1c80ad6baa13662509fa27a
font_01_sfnt_off0000f62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E42 10760 bytes
SHA-256: 9dad92530a87cb6e10dc32be081e945024ca32ca92b45c39f2a4f0ab7d851c38

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