Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95ca54c93d6cac2…

MALICIOUS

PDF

87.2 KB Created: 2021-06-29 00:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9abcec16198f2ee95d2264005d84922f SHA-1: c1a6573e6defb20b47070dbe9fb11080ccfe19cf SHA-256: e95ca54c93d6cac2da24bd211a60ba182d060d1754960d154706e605926afab3
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating it is designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and embedded links align with techniques used to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d3398bb64---50270871005.pdf
    • https://abofahed.com/userfiles/file/baxatetideginudi.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947a8853ed0---pesiwefipasakorafe.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d99d50456---82705248019.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608d77a23bb1f---5236478864.pdf
    • http://chalappuram.com/userfiles/file/mesonigudefuzimulozolule.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1bd02f470---96061939214.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb79b59ac9---11127458840.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609180b3e7c3e---98871505058.pdf
    • http://darec.sk/files/files/gaxelepovaborosesaz.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/ouspseupku5eq462uamklo6cl6/67158477839.pdf
    • http://novussiteyonetimi.com/uploads/file/22012361057.pdf
    • http://targhevaticane.it/userfiles/files/60219282089.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/be0006b9f3f484621f9833d42badc8f9/biwevozagenukopudadus.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/9bcb93f3d0294a4c139e24b70be6671f/1809400451.pdf
    • http://szpital-sulecin.pl/images/fckfiles/file/lixofonalu.pdf
    • https://sport-jicin.cz/dokumenty/2750646729.pdf
    • http://artospace.com/pics/file/jejigisefuxubolaze.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/766a653f9b5346624bda8bd017c5250a/80945910488.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab198adaad---43711462961.pdf
    • http://curry-box-deluxe.de/userfiles/file/32339185667.pdf
    • http://www.moyekolodin.com/files/kabikorilosuno.pdf
    • http://canvangdientu.com/images/file/53614660333.pdf
    • http://haustechnik-hagenauer.at/15823795906.pdf
    • https://alihuata.com/userfiles/file/45521572999.pdf
    • https://t2sc.me/userfiles/lekepazibadawusuwininazo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=a+growth+mindset+is
    • 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_off0000f42f.bin
870d946f956197377c0cfb16d824a89c5c77a3e8e45082d0aba4533044d93203
pdf-font-stream PDF embedded font (sfnt) at offset 0xF42F 10552 bytes
font_01_sfnt_off00010be5.bin
237d2fb11a0287a685b5c8f2daa9b474d6b0e5ec1ea8d7e9e8f8891f93ad7099
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE5 16792 bytes
font_02_sfnt_off00013740.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13740 16792 bytes