Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada9de799f4e91a6…

MALICIOUS

PDF

89.4 KB Created: 2021-09-07 00:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d12b22945babfa8307c4f2805d9a26ca SHA-1: 72a7fb5c4026e36549d82930d85c9ef03fedc85b SHA-256: ada9de799f4e91a62a5ac87a9b503d3ea7cbb37bb8a3093ca65fdedce785ac55
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cb421c699---89124833780.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/cdc9a8aa18481490e82c8d82b1dbf51f/barusupaguvekazu.pdf
    • http://jingmingtai.com/filespath/files/20210814071348.pdf
    • http://luligang.com/ckfinder/userfiles/files/5766335729.pdf
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/femopixubodavaramun.pdf
    • https://puntoagricoltura.it/file/56892265788.pdf
    • http://comp-art.ru/userfiles/file/lizimoledidob.pdf
    • http://kiavysocina.cz/UserFiles/File/3225130787.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/4vaj7rgo1nvvvte6fnq9b8ocig/21217838774.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/0dddcb4d64b43f11484127cf586bb783/3840330634.pdf
    • http://energy-labels.com/userfiles/file/baxekafedifutakado.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/9fa64485ad10d93c85f0eb70acf5fa72/muxiwew.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/2e4bbc5f3e591b4a50080e5b9257e98d/36493398881.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/1c6bcd919a724ede9e3861527184050d/44545083027.pdf
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nonudada.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860ab4999f7---difuludop.pdf
    • https://bioesteticaonline.it/file/86200919563.pdf
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/85562814003.pdf
    • http://shopcloud.cloud/ckfinder/userfiles/files/guwogap.pdf
    • http://meble-tk.pl/userfiles/file/xamadufelakowa.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d16c0cee06---makimutufusojokimo.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070823572527---8748264772.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/54c620a4cfdbb995b236d4e0b1c9359f/laradupowu.pdf
    • https://abandassociates.com/ckfinder/userfiles/files/dirumobafojugowoda.pdf
    • https://ahha.az/userfiles/file/fubuzulopusudabupal.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=wago+codesys+manual
    • 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_off0000e566.bin
35268b5144ae126d4af096c4bda2f59788a3cbc1933b150991e493503f89665e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE566 26564 bytes
font_01_sfnt_off00012790.bin
7dcc27784a5f5959e19f7cdb33405a95317c1d8f797d237bbeeff146748e2d61
pdf-font-stream PDF embedded font (sfnt) at offset 0x12790 10628 bytes
font_02_sfnt_off00013fae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAE 16792 bytes