Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23eac54be64e284…

MALICIOUS

PDF

70.4 KB Created: 2021-09-29 09:35:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e3e0602cad2f171f17adef5c90986766 SHA-1: 9a59ca333c5e07dfab87fc070dec43dc66bc3482 SHA-256: d23eac54be64e284ea3c0b0349bfa8d1759469c855cabb090984c2da309492a2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript suggests it may be used to facilitate the redirection or download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://oniceh.ru/uplcv?utm_term=android+patient+tracker+project+ppt
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/1526c13e17a93ced838e77288c0f980c/dinawogagufutanigonuzej.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137e23e58cc0---94216629936.pdf
    • http://ping-property.com/user_img/files/20061983064.pdf
    • http://epilia.com/upload/FCKEditorfile/99463764367.pdf
    • http://qapoll.com/2015/vat/upload/files/27334062137.pdf
    • http://jsdarvin.com/files/91872169596.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135cd350cbfb---42076730800.pdf
    • http://coumert.com/images/file/xubiposase.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/c934335dbbd0e816831401fd1dc860ca/19609014969.pdf
    • http://allivecoat.com/userData/board/file/31019250442.pdf
    • http://qishuochem.com/siicea/userfiles/file/93819638906.pdf
    • http://buyyoutubesubscribers.com/ci/userfiles/files/44294051309.pdf
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/zosufe.pdf
    • http://jinwoosmc.com/userfiles/file/49383162970.pdf
    • http://hanmih.com/userfiles/file/20210923033229.pdf
    • http://shopabrang.com/images/files/20465732877.pdf
    • http://nilesk.com/userfiles/file/todivazimabup.pdf
    • https://cf2019.codefon.hu/js/ckfinder/userfiles/files/jogobusig.pdf
    • https://weborder.cloud/userfiles/file///lusovamakosutedisusewedo.pdf
    • http://bolt-go77.com/fckeditor/userfiles/file/xadopunupabelara.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153b527dfd2c---65401894577.pdf
    • https://mangallagn.com/images/file/xedetuvefo.pdf
    • https://hbfilm.ca/resimler/files/43092795720.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139bdd20ead3---57279437587.pdf
    • https://toananhmedical.com/uploads/files/kobima.pdf
    • https://novamakine.com/upload/ckfinder/files/vegolujag.pdf
    • 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_off0000b4d1.bin
f81acc7b6fc71be47ca46ad21ae319f79f4838d07e0d4b10999fb04e53bba979
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D1 10496 bytes
font_01_sfnt_off0000ccc4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC4 16792 bytes
font_02_sfnt_off0000e4d6.bin
ffa6228c7a771e3e7d603e77d1939b5bc49590ded84a4c8e5ecb6c5211696084
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D6 15448 bytes