Malicious PDF — malware analysis report

Static analysis result for SHA-256 22dfe620751ded9d…

MALICIOUS

PDF

85.6 KB Created: 2021-09-13 15:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dbb11ebedd58a32ad27d8115f39570d6 SHA-1: ced900e90d56796b12de22cff0161edec077b874 SHA-256: 22dfe620751ded9d46645d81d58d246999b2b6a644a815c929b714ae5b16a6ed
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many of which are structured as download links or are hosted on potentially disposable domains, indicating a likely attempt to distribute malware or phish for credentials. The presence of a 'download button' heuristic further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/uplcv?utm_term=irudhi+suttru+full+movie+download PDF link annotation
    • http://faurau.com/luodan/images/userfiles/file/pemanagusanonim.pdfIn PDF document text
    • https://agrando.cz/files/file/goxula.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/piremoxotiwif.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/nituragakaxe.pdfIn PDF document text
    • http://ljjxmining.com/uploadfile/file///2021091218062598.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/misagudagulodukusunazikik.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/29006494222.pdfIn PDF document text
    • https://ghnservizi.com/file/9464742087.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/ligadorosanaga.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/64045434947.pdfIn PDF document text
    • https://cnc-ar.ro/files/file/kutunobaxotelurojukigog.pdfIn PDF document text
    • https://rinducm1.com/contents/files/fowiwefuxa.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/5a63efb98adb04252bcb31676e13e561/63790948611.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/walakabutikewadotofi.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/50655443900.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/92073911430.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/24567847472.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/42087604278.pdfIn PDF document text
    • https://media-get.com/userfiles/files/nepomev.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/fd3261ae989315447640b194d467a66e/81813770600.pdfIn PDF document text
    • https://italvaping.com/file/60424891286.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/42620486912.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/wefofot.pdfIn PDF document text
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/35874175981.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/sufumokaxadupidewot.pdfIn PDF document text
    • https://mmtours.si/uploads/71336506158.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/68978980704.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_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B1 10820 bytes
SHA-256: 8cc53c99d71ec37eeecc5e0868aea5e401e9654ea2fdb4a0d6359fda5596d835
font_02_sfnt_off00011b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7F 17256 bytes
SHA-256: 68c28a296ac1faba4f2fea5e8a115e8e25132c23589cdd868f610fe3139b9b1e