Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce293b48e817963c…

MALICIOUS

PDF

97.7 KB Created: 2021-06-27 02:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc5414c981b9d64cd0b8c2b0ed83eeda SHA-1: 59035e433d875a1102e9c459564f356ba622725c SHA-256: ce293b48e817963c1a6817dc6f5498b93be2b17d02df8ecdfcff5a406e116b50
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware hosting sites. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/3ca6218bb67c6bf8e7c5178106de49dd/94946919982.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/e9567e7731c8c2c846f12b397f54f80e/verebejiwosogoselo.pdf
    • http://jjinline.org/file_upload/file/89832442026.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/018ee3ada88e847e9b8285d28fcde549/dajorekawufibi.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/8f9418391598b00754dd1559b4bf498e/satewofabub.pdf
    • http://ropesadventure.com/d/files/30316207355.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/d537ce3c999ae898aa6f4eb0824a6a31/legatasenetakaxinuk.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/c0b7d576a8ec3b824908936cbfdfa6d0/20941642850.pdf
    • https://tort-art.ru/userfiles/file/55446342581.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/b3a326a1c254b369598e684b63ae800e/8458305949.pdf
    • https://businesslife.com/content/file/83204233796.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1056ce998b---67955975017.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/213480a90d8a6cecbfe920e98b2a3f96/28293072139.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/n609evl7u4gtnjlf7jgj2jkjfv/30630168168.pdf
    • http://cck-brno.cz/ckfinder/userfiles/files/wezinizodotax.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/togadajifepev.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/b0ece4b66d087ad719e344367d828071/79860584614.pdf
    • http://docando.es/js/ckfinder/userfiles/files/53738139139.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/662e5fa71b40cb684928f9d500cb7565/modumozinipotinatebegasis.pdf
    • http://stonebreaker.at/gakatuzuwakopo.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d2ffbf1d8---wojukakefemosexiwu.pdf
    • http://praconsulgroup.ru/pict/file/8829064959.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=famous+explorers+marco+polo
    • 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_off00011d3e.bin
27b048848fee2662f84e0e5bf03650b5536a42d65471aeb12dc4f250159a76af
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3E 17248 bytes
font_01_sfnt_off00014a0c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A0C 16792 bytes
font_02_sfnt_off00016223.bin
bfa693bcd6f8a67db13f18b8a3b5191b8455fa346b55de72699894412b4b4b1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x16223 10420 bytes