Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1e2ae794cc37d1…

MALICIOUS

PDF

69.2 KB Created: 2021-09-28 00:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 63ebebfc29893bee7f6e92d7d77847ab SHA-1: d9d34a14ff87e683845649df94c97874e9f3b69a SHA-256: bd1e2ae794cc37d19b3ea5563de4c66317e84fecb851bfb538bf0552aaad678c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded JavaScript suggests an attempt to execute code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • 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://ropaalmayoreo.com/images/userfiles/file/77912887844.pdf In PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614d433c5a46c---fodurafuwozizotekigizat.pdfIn PDF document text
    • http://idroter.org/userfiles/files/birupadilifajepudulus.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/wekobofuxiporiludodefiji.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/bidurofikodojote.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/50989867306.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090810004710.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210925_327F1CC262325CA1.pdfIn PDF document text
    • http://bugskin.org/userfiles/file/takezibag.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614ee7733e27f---56211948829.pdfIn PDF document text
    • https://widerbet.pl/userfiles/file/lojupefiwovob.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/65547540859.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/pofupoxizemefupakijuk.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/44064486066.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161360192523d5---78370029361.pdfIn PDF document text
    • http://harlit.com/upfiles/file/pogowixepedinefenozosafug.pdfIn PDF document text
    • http://metabolit.ru/files/file/vikawumo.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/refidawaserofumasaxijivo.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/45370135444.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/giwudurokigolarajipow.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021092700225644.pdfIn PDF document text
    • http://sparkpro.lv/content/file/73411771980.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/xegonogotu.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/ximunofefagupumise.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=prime+video+tv+apkPDF 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_off0000b31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB31B 14620 bytes
SHA-256: 94f6c869556b76d82c6ab87873b66b0b450ef99421a8d3cc53d485b8993bad28
font_01_sfnt_off0000d7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DE 10396 bytes
SHA-256: d12c471c9ddc0539f47a87b5ce6b4ce270b26b2a888cea13ce7ba4939c5b9423
font_02_sfnt_off0000ef69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1