Malicious PDF — malware analysis report

Static analysis result for SHA-256 d487c7a5b8f2e30b…

MALICIOUS

PDF

91.7 KB Created: 2021-09-18 04:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 5d3d430dd806cf7d595dc50f2974e754 SHA-1: 1d5b8ec3b7a524626aeb5612bc72b1832e7a8218 SHA-256: d487c7a5b8f2e30b273bc1935896dc2d974edc8a81d152783b35b7b24b324b3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous external URIs and links to compromised CMS uploads, indicating it functions as a link farm. The presence of 'utm_term' parameters suggests a phishing or SEO manipulation attempt to drive traffic to specific content, such as the 'grand theft auto vice city mod apk' URL. No scripts were extracted, but the overall structure points to a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://ketchas.ru/uplcv?utm_term=grand+theft+auto+vice+city+mod+apk PDF link annotation
    • http://geologocarmignani.com/userfiles/files/38797895855.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210912153826735.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/varepafiwesaruzel.pdfIn PDF document text
    • https://hotelharmika.com/assets/userfiles/files/4519681332.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/sasabanepezomesufi.pdfIn PDF document text
    • https://birotex.rs/images/files/27013941755.pdfIn PDF document text
    • https://titishop.co/upload/files/19769127124.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/161412e646744e---61275277210.pdfIn PDF document text
    • https://kiptep.ru/file/50944230295.pdfIn PDF document text
    • https://globalathena.com/ckfinder/userfiles/files/gaxugaxebasiwifopoz.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/33367921216.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f5080d093---19323988920.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/zelenuvurenudusox.pdfIn PDF document text
    • http://carbontuning.ru/file/soxulipudatotadabagoj.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/93972157667.pdfIn PDF document text
    • http://camara.acessoainformacao.org/uploads/ckfinder/files/44925841810.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/97522753860.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/wepojapasozesul.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/931f24534adb202d9952b663ed686c25/96462309887.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/numowudogek.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/161447bdebc946---13081158082.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/98282648072.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/e2687eea5fceab8642af2e098f3633ef/mukoxiwenerosakuwekiza.pdfIn PDF document text
    • 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_off0000ff93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000117a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A5 18356 bytes
SHA-256: 45be6c8640e070863a6ca6251b2689f58b06627f0068d2ad480f9526be06ec1f
font_02_sfnt_off00014762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14762 11084 bytes
SHA-256: fb920318619e803f349a454c3775b1b276dee1181590231e28113eb1b410f083

Open this report in the interactive analyzer, or submit your own file for analysis.