Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f0afcbd8cbd209…

MALICIOUS

PDF

91.5 KB Created: 2021-08-05 00:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 33f413a1586c95495c0d293c00d53cfd SHA-1: 19e7ce0e3d134c09deda0dc97a4c87198d6963bb SHA-256: 29f0afcbd8cbd209ededd2fbb332a94cbf7648c393f8d54784e0e321e1642169
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous URLs, with several hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, limiting the analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://metamorfoza-krosno.pl/userfiles/file/95280351262.pdf In PDF document text
    • http://ngor2-3.com/file_media/file_image/file/91997215063.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/72496793104.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/11105bb8669a4bced58de42765af0241/xobijazovabudi.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/laqg941jr2fg7a3gul6seretv6/2777715595.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c424f9a992---29543770672.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/kilekuguzaxigozixi.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/0nne49v59klc6ugq8d9uvqra2m/kowabamovoxexom.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/g0m8dcr3q346m6ttueu4s463u0/93483551115.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/lo5pho40mfdshv35meslvu1p9j/xatit.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be99d3aa6f9---28243460109.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/rout40ku6lh85lj4ti8ho5lnei/79462884970.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/12810841932.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608d61815ab90---bazezebuvitesevewini.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/37003466718.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/c12a814ccdaa3eabc99e258c27e406f9/tunaxawunizoreladosalin.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb47b31a80d---vibuxazujegiridepefiga.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/b312027f5481005b3250d812623cf084/wazudoxojefigemonaxaka.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afaf786cad---misalazitenetomi.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/83312829491.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949772de91b---balokababepikido.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/40279279676.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/xuxuduzufugonejupotevi.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/8c8a101842977da71ebdb5b7c2420b48/lepukemubipumijaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=onbathu+kolum+mp3+song+free+download+starmusiqPDF 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_off0000fe59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE59 11708 bytes
SHA-256: 9b58af4746cf0950c761aa90de0de55708f326a072fd701cc61d04d31abaf124
font_01_sfnt_off00011967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11967 17236 bytes
SHA-256: 58e1051944c1e69c38c82a1721a1f5c65151dddcfbad7f003265163c83dd229d
font_02_sfnt_off0001466f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1466F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1