Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6c023e3a381551…

MALICIOUS

PDF

72.9 KB Created: 2021-09-02 01:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 0b9ec767fd8b87d83f2f7565ebe698d2 SHA-1: 2a2a0d8ad432e17106b1a5c04102f721af8c05c4 SHA-256: 7e6c023e3a3815516fb01b9262ce4a5658ae109e07c3a84e6a1b99a409d7b69d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://myparrotfood.com/user_files/files/54371979066.pdf In PDF document text
    • http://hf1968.com/clients/48820/File/mobegegigegigosovo.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/xoxoxirijawu.pdfIn PDF document text
    • https://diamond-marketing.cz/soubory/82638675813.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/4900948844.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/jademidutawivumajoloxozip.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160788b6bbaf53---zuwavug.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/winak.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/366f4d1a9da894dd061b697fe7db02c8/53142971791.pdfIn PDF document text
    • https://mimpi1pusat.com/contents//files/kazibupez.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160894d365a80a---67715805252.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/27661895534.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/20751728980.pdfIn PDF document text
    • http://esejsc.com/upload/files/96779217124.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/99680160831.pdfIn PDF document text
    • http://www.houstonorientalrug.com/ckfinder/userfiles/files/zojivivewovimufud.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/76a8833720aab5dc9311f1767bf0955d/ketarulufatukemebev.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/25497442803.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/xisalapetopokugonozelugi.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c44b8b27a27---28656464742.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcf0c1c5da---tixibewo.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d46093e5ca0---wepimakido.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd903d1a49---mumikigux.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9d5c17978---43560686405.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/cc157519e2a9cdfe9f8957e9c5a7de45/95311986635.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/jatabipikapa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=easy+beagle+drawingPDF 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_off0000bef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD708 10528 bytes
SHA-256: 74a257ec1e2f6f7d8fbcb44ada17d96a9336955728506a7bdc4b30f34db8a63a
font_02_sfnt_off0000eef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF0 15208 bytes
SHA-256: 92ce3253c807660f2729cd3b639094582b2bef798847dcb3c378097710232771