Malicious PDF — malware analysis report

Static analysis result for SHA-256 e698d2a4952cb337…

MALICIOUS

PDF

81.3 KB Created: 2021-09-04 23:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 6263129667c0b74cc99bc330bce669fe SHA-1: 831aff72eeaf56dbe377d9cff9e3c7ee848a71d3 SHA-256: e698d2a4952cb33797411bd5a0b6ada7e10d32c0c82977b59b53db64caca70df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised WordPress sites, likely intended to lure users to malicious content. Heuristics indicate a high likelihood of malicious intent, with ClamAV detecting it as a phishing trojan. Although no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to redirect users to potentially harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9ba7567bb---42778700225.pdf In PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/zetetofexiripupez.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16090944bb6bee---fimatigowakutatiruro.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/35365147475.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/porejebamubewifog.pdfIn PDF document text
    • http://greece-ex.com/33582386777.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160770c1fcab4b---30019570712.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021618346296219.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/94434175158.pdfIn PDF document text
    • https://peltonfell.org.uk/ckfinder/userfiles/files/94389755147.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/895434ee26085cfed7e43fcd9605e1a6/lirowuzenemibif.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcefda8c98---nagudusujovanijopa.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/72093673398.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/74268750409.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/mijevozazewexazosuga.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609673ab3380d---34841806247.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///41550267403.pdfIn PDF document text
    • http://emurus.jp/userfiles/file/68633459631.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/lolepojuruxavisob.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/xakepuwuxuvuda.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1612c38d172b9e---rokixiduzuzaderaditogiris.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/legulukapasejaxoxesivig.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/78985279881.pdfIn PDF document text
    • http://davcpundri.com/css/file/17383659695.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/14297787532.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/cansr4odiiunbej7biqa2d8gpc/61120313846.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=convertir+de+powerpoint+a+pdf+i+love+pdfPDF 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_off0000da56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26D 10508 bytes
SHA-256: 6ac41503d0358c47450971eefd8b7088f209f68b73d486d78672f7b75e6e5091
font_02_sfnt_off00010a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A85 17192 bytes
SHA-256: c61af018a6e55f8048f1c1c355844d5ebb8cc8f238a499ef9410198432beb0b0

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