Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2257e3db053da93…

MALICIOUS

PDF

87.2 KB Created: 2021-07-20 03:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9644ed96ae123fcc9854f73d68c36cb4 SHA-1: 8181994b292e703e33ca2f255c0eb51a28ed903d SHA-256: f2257e3db053da937bd02c56da732d77cfa6f160e715c17c08baa16d06963432
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is an advance-fee scam lure. It contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The embedded URLs are likely part of the scam's infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://plnjl.com/userfiles/files/13929345635.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e0a98f6fea8---janenigizore.pdf
    • http://bakoca.hu/files/file/wuvera.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/mibezemevil.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f7baa0d6---14260644375.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a25d79b2d4---53839637975.pdf
    • http://infrabud.eu/fckpliki/file/61262189826.pdf
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/85887302414.pdf
    • http://cheumst.com/upload/fckeditor/file/nulewa.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67ff887aea---tesusamurubawoleb.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160899186ef9f4---rapegubijezo.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcb1de3966---zoxaneguxare.pdf
    • http://ruihuitax.com/files/file/xogagemezefojuwe.pdf
    • http://pivotal-technologies.com/userfiles/file/jewixoketun.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606fea4c6d89f---84490901044.pdf
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/kumegemupotoxane.pdf
    • https://aljazeerahpetroleum.ae/userfiles/files/9088974389.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/ofbmuv7knq5hea45kmov17nipb/gurefojisopezoladelid.pdf
    • http://ooexperience.be/assets/Image//files/95261063688.pdf
    • http://rilta.net/userfiles/files/dazazomefuzix.pdf
    • http://anhbanglaw.com/userfiles/file/93059039978.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+put+shadow+behind+text+in+photoshop
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f120.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 16792 bytes
font_01_sfnt_off00010932.bin
917e0f8044aebf57c75b460168853ba0e14ba8658a05c73921463fe609498335
pdf-font-stream PDF embedded font (sfnt) at offset 0x10932 17448 bytes
font_02_sfnt_off000136fe.bin
268b2351bb89cef2ae6ea4187ce365758b4f05f42385ddf7ba0c7bebdd0834b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x136FE 10760 bytes