Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0980a77e557d5be…

MALICIOUS

PDF

71.5 KB Created: 2021-09-29 05:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2fd4b6d67fd5a22d26e9fa4dec4005f8 SHA-1: a1779cdc3807281b51f1d6199b13ac3fc8cd45d5 SHA-256: e0980a77e557d5be452f1de0b7f18bc7dbb43861382bfe4b99207806a92485bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host and distribute malicious files. The presence of multiple unknown URLs indicates a phishing or malware distribution lure, likely intended to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/161428cd850b63---puxajidelofagukaji.pdf In PDF document text
    • http://mitroc.com/userfiles/file/jutogij.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/libixidatob.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131720018875---wisasajamani.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/21945979841.pdfIn PDF document text
    • http://lovesenergy.com/file/kegarokevewi.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/84804405938.pdfIn PDF document text
    • http://sgpeo.pl/users/file/40081308934.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/65794424395.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/wunubilomanezumi.pdfIn PDF document text
    • https://tipresentoio.it/images/file/86222385755.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/37333064494.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2d57db85f---73719089303.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/40825573053.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/87448466079.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210918_073536.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/53963278892.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/getezetelebifoves.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/56330049172.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/binukaxusajajowomiwa.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/pinenimupesumekufokavija.pdfIn PDF document text
    • https://unovosti.tv/ckfinder/userfiles/files/94292180720.pdfIn PDF document text
    • http://autovoda.ru/upload/files/81196859771.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0c8c0be65---17045120557.pdfIn PDF document text
    • http://seamacros.com/upload/file/pafuxizibu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=animation+studio+apkPDF 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_off0000b5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5F4 16828 bytes
SHA-256: e3785fe5123e3a32e9812fba3b66789eb636cfdbce3a57e7aae1f65bf056e0e5
font_01_sfnt_off0000e0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 10448 bytes
SHA-256: 915a6b10ecbcd279371f9f9160171991e0b7264907b1712be01a992acc713414

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