Malicious PDF — malware analysis report

Static analysis result for SHA-256 916b49a7759f3270…

MALICIOUS

PDF

73.5 KB Created: 2021-09-19 21:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 82ada820a1aa0e7e150a186d6a603c56 SHA-1: 390ad110ca50bc4dc654ee0d1bb3344e4e4c63c7 SHA-256: 916b49a7759f32709ed4e7c8dd0706e09a7926dc8bc1a6ec40bf151c2963d3cf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to download and execute further malicious content. The document body, though heavily obfuscated, suggests a lure related to downloading a game, specifically mentioning 'download game minecraft versi 1.16'. The presence of numerous external URIs, many pointing to potentially disposable domains, further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://rachelrom.com/rescontent/file/logevenikilimed.pdf In PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/bogajujumiwirezafivemag.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/godebovarir.pdfIn PDF document text
    • http://melvin.cz/data/mezifoz.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/kepetesufomilarudegav.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/masuvevukosapadogu.pdfIn PDF document text
    • http://ver9ctrl.sonikgps.com/ckfinder/userfiles/files/tanofufokibonetanebo.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/savavalaniteloxukimoka.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/38485555346.pdfIn PDF document text
    • https://kenkochaya.com/user_data/ckfinder/files/dagaposo.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130140812cb7---76705042543.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/29104712927.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/10654676096.pdfIn PDF document text
    • http://sabancilojistik.com/userfiles/file/9205817981.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/kofarobikuzodezosij.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/60658343460.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/samaxajiwukevazuxerol.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/88028197039.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/24115143747.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210916_37B20AD3C95C7AA8.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/30243222607.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/pofegakejobakewurajapa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=download+game+minecraft+versi+1.16PDF 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_off0000bbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3ED 16224 bytes
SHA-256: 5d7d5652c5f9ab30a35f0f1a4801f111003165e9d73782ca51e332b765d5a219
font_02_sfnt_off0000fdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAC 11260 bytes
SHA-256: 805ab5d7544e8f1becc35504cf7d2f741af9ef5f00ca1c5a4ac5b66fcdcd4387

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