Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c770164395cbaa…

MALICIOUS

PDF

90.6 KB Created: 2021-07-01 11:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: fad688c076587f2cf5fbb09cdb7be59a SHA-1: b92c9cf204b0e2cdda870257e266fe476e9609f5 SHA-256: 30c770164395cbaa4642a7445d78e29cf55a0c0e2ffdcadf223b137d30d48c5f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, characteristic of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://motorlustor.net/userfiles/file/ritopugasi.pdf In PDF document text
    • http://ahcxdq.com/uploads/file/040412128791.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/22783260060.pdfIn PDF document text
    • http://hyderabadibiryanicorner.com/admin/images/file/10628683958.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607274926a84b---48983616307.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/peliwan.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078986387fe8---givezadaxuwexujijevidoluw.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/9123e7fa0a0ffebb58f4777af424811c/80034914451.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/pqca0nab3k9b7ej519f6scpia5/jusikijuwutetekal.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c49af255407---26722633614.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ugbfrags46kq7put7c11ol562k/xatusok.pdfIn PDF document text
    • http://adbuffalony.com/uploads/files/dozigi.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6ad6efa76---lugujetisavisuwagelene.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/bbeaa3662d33b7ca26f2dc2b3e0ddf45/fajomafogudepol.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/64421711996.pdfIn PDF document text
    • https://digireg.org/upload/devuwetudijanonajom.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/41qpd9fkm1elan0na91r6op6jm/83178986975.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/34592582992.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a07a46adf38---64072086130.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/tanetisitotajoxidi.pdfIn PDF document text
    • http://bomtvplus.com/data/board/file/20210626072822.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf15c0ab1b---37863804778.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/e96a01d055f7f1fde0e54b0b24fd499e/3133089537.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/7b7c9e816051f44315a06005be3c6573/lotoxolezaf.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/vexigupi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=holiday+in+handcuffs+on+tvPDF 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_off0000fcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFC 10612 bytes
SHA-256: 1ea11a12ea78b54a1d578704fe8d1601ea059dde1517883ea131e51b50afcb28
font_01_sfnt_off00011528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11528 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3A 18780 bytes
SHA-256: 7cdef97ecc8f733759dc4eb0c69d7efc9db81d8fb72b3b7b70fe9ab43c13fddd