Malicious PDF — malware analysis report

Static analysis result for SHA-256 8665044511aecb38…

MALICIOUS

PDF

85.3 KB Created: 2021-08-02 17:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 32c1e4fe25c02fba5023615aa0e8c4d0 SHA-1: d176ab46f0672f773a9b87f6c76a0d5ae656f74f SHA-256: 8665044511aecb38b606192c384d72213cf0d69ed85e6a257ec8ca49be90ad0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics as containing a link farm pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The presence of numerous external URIs and the ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic findings point towards a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=attaullah+khan+sad+mp3+song+download+a+to+z PDF link annotation
    • https://olterus.com/contents//files/60561465530.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/44644305872.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9317e2d1f---mevujetoreruguxuwuwoxo.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/tipemijowegizima.pdfIn PDF document text
    • http://imi.vc/upload/files/lofilafexikalu.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/28d228d8fa6e9aeedf54efd31e187aa6/giliga.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/2256642500.pdfIn PDF document text
    • http://jkohut.pl/file/roruxojifagufexumukenix.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/9e1f4d9affae4052cb057d223ff6a847/kokiwimojexinixulenos.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/6cc28a14e5d94b6d80c5461813d34cae/kuwij.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f65cbae6ae5---vuvibevuvadox.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/bc437340912eb13a531b187a60aab420/xujinebe.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9c6c4fa4b---kaxofotu.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/20215111224477413.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/zobamijogonuwopade.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77071602905.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/5805179631.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/14350082936.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081abbbc37f3---zupoxib.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/f84975768482e50f532ac315e594033d/tolededadijem.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b165ed9165a---24844688432.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/85khtu425kht49i3jlkgmgrc8m/53483178150.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/wunivavajozumekebusuwava.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d85a91eb70---22849266701.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_off0000ea13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10225 16944 bytes
SHA-256: b68323449eb9bfdc9b4b85d58e330d50b47bd8eaa17362039bbed90ac6d73241
font_02_sfnt_off00012ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE9 11004 bytes
SHA-256: 4354c46b8b328f65ea1221ebac87bdd235b5d0a9932c82f1ddd5ccb5059a2840

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