Malicious PDF — malware analysis report

Static analysis result for SHA-256 5184eb42956a5dfd…

MALICIOUS

PDF

73.2 KB Created: 2021-09-25 08:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d050a6a6b206f43a1f1ad9e7b41b27b3 SHA-1: 55c07e3b39a8efa991010084ca9b791d88b9995c SHA-256: 5184eb42956a5dfd9c8acb4cf70a8e90df7ca2c45e3a39f87d005c895ec78507
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. The presence of numerous external URIs, many of which appear to be part of link farms or disposable hosting, strongly suggests a phishing or malware distribution attempt. The document body is heavily obfuscated and likely contains further malicious content or redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://laborke.ru/uplcv?utm_term=wonder+woman+1984+putlocker PDF link annotation
    • http://foto-recepty.sk/images/fotky/44561814786.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/63480394134.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/xuvuvudovituteweput.pdfIn PDF document text
    • http://pjteam.hu/uploads/pofirutudevijolewoditas.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jexesenadogopulupid.pdfIn PDF document text
    • http://0228339500.kad.tw/kads/ckfinder/userfiles/files/gaxapolefujiwux.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/88320767490.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/40634471457.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/deluduka.pdfIn PDF document text
    • http://marktoby.com/akram/know_news/admin/userfiles/file/21234230473.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/gusopuginokijodorara.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///42806073558.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/65115829632.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/xufixupuxewe.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/79796820094.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16142abec76c31---wevunejese.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/sofoxeduzumezezoverire.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/67b0fd5d0471646f7a2984126a5fd691/20748541100.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1631957405.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/zajukigugapaxizipamarele.pdfIn PDF document text
    • https://www.fishhabitatnetwork.com.au/application/third_party/ckfinder/userfiles/files/84221900262.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///bukadex.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_off0000b33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB33F 18540 bytes
SHA-256: 4e758478c9d43e2828bf418371d954021d9de634e9a9157b4975736717160553
font_01_sfnt_off0000e36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB86 11192 bytes
SHA-256: 345fdf387b44b014372736aa24915cb95aa8750b5ae9af03c1db23b1d764053b

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