Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa27aabaef53f2d…

MALICIOUS

PDF

82.1 KB Created: 2021-09-18 06:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6c397bb18e5304096f6f6668bb94ed9b SHA-1: c1f5753e98cb0876685bf9386ed42a8cd547d754 SHA-256: 4fa27aabaef53f2d3105a8eb0b9ae8f3c56543bdc360603971b95b5a094805c7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://pixomot.ru/uplcv?utm_term=top+50+sites+to+download+movies PDF link annotation
    • http://aimic.com/userfiles/file/tupoporalepig.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134087e837f0---xoxufusiwuxetopa.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210906015939426.pdfIn PDF document text
    • http://com123.vn/uploads/file/64847881014.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/kogusawoxigaxetafu.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/6a775af10246b3834271379cddf9b923/9862963879.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/35670595217.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/56437957625.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/90074062558.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/84345136951.pdfIn PDF document text
    • http://bburago.info/admin/fckeditor/userfiles/file/wakeb.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202109140755441748.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/49274873686.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/mixipuzotukenatorusi.pdfIn PDF document text
    • http://hhoasis.org/app/webroot/img/fck/file/rurugipi.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/48373153415.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/6206fe540c57d6d30cbb300cbf559380/42523507664.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/90500624323.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/877335584.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/bumoke.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/zemopemipivurirolavoturo.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/sowiwuvupevivod.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/31278354501.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/tekolebilarifirujof.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/f5b4010ca40b6673307d47c5f77c78ee/povepa.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210909194921_mhgn7o.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/kukolezipazaxojupeduki.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_off0000dbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40F 17348 bytes
SHA-256: e6f070afa39145ca37e6cf9567d48995515111685046bd896f4ba33aef606c0d
font_02_sfnt_off00012132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12132 10824 bytes
SHA-256: b80b6d3d07afe6d05a9479c356b6ac8950ba7a02226733dfa5d671439f8c1769

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