Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d5873fa3070193…

MALICIOUS

PDF

72.4 KB Created: 2021-09-27 10:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0ba3565e07fc54896122bedf8d3abbf3 SHA-1: abd7348c124ac3909b7fd2f589a2988edb4b13ef SHA-256: d3d5873fa307019396b1c54bb221b280ef5301a14ab2995d653272add40c251b
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is classified as malicious, exhibiting characteristics of a phishing and malware distribution lure. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document directs users to install a fake browser extension or update, a common tactic for credential theft or malware installation. The presence of numerous external URLs, many associated with link farms and disposable hosting, suggests a broad phishing campaign. Although no scripts were directly extracted, the PDF format can embed JavaScript, which could be used to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://allytemp.ru/uplcv?utm_term=download+boomplay+for+pc PDF link annotation
    • http://organizeteknik.com/userfiles/file/jaxalenimowa.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20210917_047DCA6A6E2CFE6F.pdfIn PDF document text
    • https://qematalsihha.com/ckfinder/userfiles/files/jovebijola.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/jekibapobazinulibikor.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/9834897404.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20210916223247.pdfIn PDF document text
    • https://probidjp.com/ckfinder/userfiles/files/20210924_124803.pdfIn PDF document text
    • http://aa-nusd.jp/tolaw.pdfIn PDF document text
    • http://twilaw.com/files/files/88781642125.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/rituluwuxizefi.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/28719692755.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/88757029756.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/31251457816.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/geluxofokef.pdfIn PDF document text
    • http://mosme.org/uploadfile/files/kiwejozexim.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/64073145459.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/53fec1ef6a0994194659f89a83b1b228/woxudipowexirewove.pdfIn PDF document text
    • https://perfecthospitals.com/FCKeditor/file/xenosagegipagufijawizidi.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/09-20-08-30-36-52.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/wozaxunukenirud.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130790909c1b---9431217315.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/vamirakosajesejawito.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/37976861437.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/18443756094.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/21435133530.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/9f5130.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/wagusupaderisixi.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_off0000b69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB69C 10632 bytes
SHA-256: 6a416bb2f3a1efcffb64ec03290a7e02329292d1cb107b15af7d6d5da9080736
font_01_sfnt_off0000cebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 17760 bytes
SHA-256: c44cfdb66a612da8a92ea490fbce00b2c72fa3808c0fcb03f870c69bd2da0c91

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