Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2da61d74a556979…

MALICIOUS

PDF

68.9 KB Created: 2021-10-01 18:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6f08c8fce44a26bcd69dcffe0b48cf40 SHA-1: 10770cdbcacc472d13a4cf457303d71e04a420cc SHA-256: d2da61d74a556979d5a90cf0988a2f8235f7f9f9e4f130b801442fcf35634128
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to numerous disposable domains and compromised WordPress upload storage, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF designed for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://morard-mcf.fr/data/Files/pemufesosifipigoxivirufe.pdf In PDF document text
    • http://innova-perila.ru/upload/files/31972934571.pdfIn PDF document text
    • http://saga.diamonds/uploads/ckfinder/files/furen.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161457cb06abda---mowupe.pdfIn PDF document text
    • http://yanartextil.com/firma/files/91495023824.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e412315051---gofopoz.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a80a1bfcc5---79705884135.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161317c998b675---76734518306.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/77520803158.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613f45f457ddc---zazopuxuleru.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/64839832470.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/biwifojumexijajorofab.pdfIn PDF document text
    • https://chingchia.com/uploads/files/202109051807039118.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614723b02ba5e---8746263227.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/73765547723.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/tulumuluwumigojeminele.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/rodilo.pdfIn PDF document text
    • http://traiteurluc.com/userfiles/file/84064550149.pdfIn PDF document text
    • http://mrukseo.pl/userfiles/file/52772653271.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/46503209328.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/wojupa.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/15164052383.pdfIn PDF document text
    • https://sydneystudytour.com/accounting/userfiles/file/10152278078.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/saviladavipetozaxalo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=build+react+native+android+appPDF 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_off0000b0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C3 14708 bytes
SHA-256: c84155882a88527178b9b129f68228a6b3be877021e5d6a5efbaf8fe8fb8aa7a
font_01_sfnt_off0000d5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D4 10560 bytes
SHA-256: 0553e605a9e3861cf61a499dafc96447b77f7942e613c96d920c9fc7fde60bed
font_02_sfnt_off0000ee09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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