Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b17a4a3a29ff245…

MALICIOUS

PDF

83.2 KB Created: 2021-08-31 10:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d8741c836a927dbf73f83343c9e253f4 SHA-1: 64b8173f00ee4af4667df5fcc5a6208dcf35b82c SHA-256: 4b17a4a3a29ff2458d0defcc4a9cb2a184c286a8ed267b423ed09eceb34c8d3e
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common tactic for distributing secondary payloads or leading users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/f02ed6978b90c2852e1ad8e62973100c/46484894209.pdf In PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/9pgv0c6nbb05m1t84dsavt68f7/26421601071.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/d576880d59bf3af5a2e648fcd0cf203d/39179997366.pdfIn PDF document text
    • http://mav-auto.ru/images/file/53827727212.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/bubapuroradereg.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16109f7ed7a16b---90748096473.pdfIn PDF document text
    • http://fxmeat.com/upload/file/aa728791c6c1e42e28d498247ddc2f64.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608166d02aa7b---42038949529.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/lamusatenesewegixi.pdfIn PDF document text
    • http://sepremprod.fr/www/images/mediamanager/modevoradiz.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612ad21c8bcc0---wesunafotuf.pdfIn PDF document text
    • http://markone-tools.com/upload/files/pirufaxizuboto.pdfIn PDF document text
    • https://ka-base.no/images_content/file/25463000172.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/udpe4pufuullvma4vn4f8u4l0p/pujinapigukewuvininizut.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/22964448398.pdfIn PDF document text
    • http://roocenter.ru/upload/file/digokafunezob.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/47270195287.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/pevimugeveralodikerebido.pdfIn PDF document text
    • http://fedoro.ru/upload/file/takilenodozajotoxejuji.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160f223e96a97c---31576114961.pdfIn PDF document text
    • https://associazionebriciole.it/public/file/96598947023.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940fc66ff97---64993744225.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=water+and+fire+tarotPDF 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_off0000df75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF75 19564 bytes
SHA-256: 073b8fda62cb70ec03d5fd1b21873a9068a4bc6837696a87cd688e153416bc7c
font_01_sfnt_off000110b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B5 10128 bytes
SHA-256: c13caca54a865c604cb8ceff0a3dbed62c039cf8658823f806195c17b77f45a5
font_02_sfnt_off00012772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12772 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.