Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a564d82e14c288c…

MALICIOUS

PDF

84.1 KB Created: 2021-09-02 04:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7e56a08674ccc7cf204b830a439a4498 SHA-1: d1aef52e7dc1a660f67558e77db8808e44b48882 SHA-256: 7a564d82e14c288cddc97fb1d79ae7974dc0f895edf998c388a00bd5bce5a5b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://planbmedia.hu/files/woxejaxal.pdf In PDF document text
    • https://agrando.cz/files/file/kawusenajerawitovojo.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/99900980908.pdfIn PDF document text
    • https://parfumzone.ro/files/file/pugola.pdfIn PDF document text
    • https://assistenza-termica.it/file/69009883380.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/25386762729.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/12591246149.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210803205924.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/ferenukufin.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e512cb738e3---xidixajixikito.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16077bf244daa3---xovowojuvujowevunujazele.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/ruraloma.pdfIn PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/demixufosezarojobidiluw.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/mepaxagilaxejabopafoxi.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d2185f7bf---nediwivoberol.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/77f65b71b385ac16c62c9ab8bce83e6f/59654210718.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/40ckeiiq7to488aqadmhs5d5j7/tarukuv.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/c8ddeb4120ab74df2166543ac5a3deab/11292732962.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/tizaj.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc0ce79234---kipet.pdfIn PDF document text
    • http://bipaf.org/2009_home/upload/editor/file/jovikapulezuzerekewepe.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210514/file/fefejasimamaxul.pdfIn PDF document text
    • https://jobtiara.com/files/files/zolatopuzuromeweju.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/nivuzekakixubedunuwixokuw.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/rulage.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=man+of+steel+and+velvet+pdf+free+downloadPDF 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_off0000e466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE466 17360 bytes
SHA-256: 26e4a9dc54e0f5dc52fb61623bdca9412899a43998b40ff67309b3ecb81e0f98
font_01_sfnt_off0001119f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119F 10544 bytes
SHA-256: 2edcdfbf8d3685cdc3a92a35242bcc5a7a8f9a59dc985fed2b0f1cff8079d2db
font_02_sfnt_off000129e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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