Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f80dee88d6314f4…

MALICIOUS

PDF

74.8 KB Created: 2021-09-18 06:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9128d32f66f5da681fe7b3059239591d SHA-1: 232f894e65320b209bb7900d19792fbad2c33467 SHA-256: 1f80dee88d6314f478164fb91a880821fcff0a1dfeac4b12106678dafdaef2fc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a probable phishing or malware distribution scheme. The presence of external URIs and the overall structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/uplcv?utm_term=mortal+kombat+scorpion%27s+revenge+full+movie PDF link annotation
    • https://sagarexpress.com/userfiles/file/27082800306.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/89214072352.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/merugotoroxoledarogogo.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/maraji.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/40102618438.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d130617770150e1290a5d119a1905f6d/16151117120.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/90146592488.pdfIn PDF document text
    • http://lednotice.com/userData/board/file/88122100429.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/gulizogavuvigufoteloxer.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/pirejikafutasameluju.pdfIn PDF document text
    • https://nusantarabet4d2.com/contents/files/7538718718.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/11049965607.pdfIn PDF document text
    • http://th-hl.com///upload/files/61983150482.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/9066813376.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/37857089614.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/48762142982.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/14728102899.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/72600537936.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/xulumizena.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/6981436567.pdfIn PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/pubemafipumafetakivexun.pdfIn PDF document text
    • https://teater77.nl/userfiles/file/nimakuvod.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/49791539081.pdfIn PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/xudotiwewa.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/pidepirusukegobilavesogud.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/10604855120.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137358722567---38524304715.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_off0000bf62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD774 16968 bytes
SHA-256: 21f06f55a22c8facfe324040697d849089b3105eb861952e4712276b8018b0e1
font_02_sfnt_off0001032f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 11248 bytes
SHA-256: 2e42fe7cd8b7b32de6d5478ea2231936ecb34e8f73b6b08abc681bd81cfcf597