Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b9304719e0f542…

MALICIOUS

PDF

80.2 KB Created: 2021-09-15 23:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 79bbaf775c69596ce1854cd1828a2a38 SHA-1: 9cecb613b7a83523aac681af81718d353db23435 SHA-256: 14b9304719e0f54265f0c6f38fc979ce938dd46a7f2d95d19fc592d1274e82dc
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://studiofagiani.eu/userfiles/files/maraji.pdf
    • http://uitvaartverzorgingsindex.nl/images/uploads/tevuvoreteretalimimirolu.pdf
    • https://aldwalia.com/userfiles/files/74452967131.pdf
    • http://essentielles-theater.de/UserFiles/File/kipakesekaderasaziga.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/b7a7184e466ce27e4c12c50b8c9966a4/jotupimuzojobo.pdf
    • http://www.iece.in/userfiles/file/novunirusasijoxurimilu.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ca70c67c93d6389777d19edf60c0fcc5/fajavedovodirujiwel.pdf
    • http://scamps.biz/userfiles/file/wilepisosufixud.pdf
    • https://stotex.rs/files/70379302275.pdf
    • http://c2ctrading.org/cms_upload/files/27895056315.pdf
    • https://kfk-dekoration.dk/images/uploadedimages/file/videbobokikowimi.pdf
    • https://ijaetis.org/ckfinder/userfiles/files/kisizuvurepedomoda.pdf
    • https://mallarpurnaisuva.org/go/file/webokumibasejogesulivurik.pdf
    • http://videofilm-tv.ru/content/File/limezawumofizexedizep.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/cf398b2361042641f651c414412e5ad2/setozoparobig.pdf
    • https://termofriz.rs/files/gajixi.pdf
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/17839512808.pdf
    • http://gammatradings.com/userfiles/file/3584402585.pdf
    • http://imcborivali.org/userfiles/file/4659585991.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/b196684955414f9508f90f367175890b/7815062863.pdf
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/25302775611.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16140025853781---tututatobama.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=my+gateway+ip+android
    • 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_off0000d410.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD410 16792 bytes
font_01_sfnt_off0000ec22.bin
68c28f24dd45834a2326b360deb1da54a956fabaa8d675f5183af1c9d48ffe87
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 18064 bytes
font_02_sfnt_off00011b28.bin
9af2f69209daf477adbffbda07e69f772c8f966bf7161184324817b228fcae27
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B28 10544 bytes