Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd0ba14a95df0ec…

MALICIOUS

PDF

76.8 KB Created: 2021-09-13 02:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d4bb2fb64191868756b8dbcf155a5cc1 SHA-1: a7043f8b546ff7f9462f12715ca16b162ee74b8c SHA-256: fdd0ba14a95df0eced1e5c33bf4e70f9807cdd8e9e616e1c66c0c6dcb005ede3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV also identified it as malicious, likely a phishing or trojan delivery mechanism. Although no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to malicious content.

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
  • 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.
  • 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://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/1e52ea175fe2a3e803f7131218f690d6/jofepifoj.pdf In PDF document text
    • http://gemculture.com/userfiles/file/63382721429.pdfIn PDF document text
    • http://saga.diamonds/uploads/ckfinder/files/xesexasujewudimofi.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/c390fa213741ecd8a4fc957033401770/nimofipim.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/77027281261.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/mujazetitutubetomodav.pdfIn PDF document text
    • http://jsjxh.org/filespath/files/20210905081114.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/60778226795.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/64208940489.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/34764044221.pdfIn PDF document text
    • https://ottopianos.nl/files/1705333830.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/98642072210.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130993409405---22318787305.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/148o51gj82lpk80gttfva6s864/95545026528.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/lajanebedokudido.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/15250940163.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/34267706830.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/14151378770.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/20805165024.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/zufavore.pdfIn PDF document text
    • https://autoskola-scp.com/files/54941184669.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/98017120291.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/22735742749.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/43326113239.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/jedafukabos.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/84874370763.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=download+pes+2020+ppsspp+filePDF 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_off0000c943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC943 16748 bytes
SHA-256: 76dbc17babddbabfee54e14abfe65b5d381f0cb617ee2a590f12af3df670bcde
font_01_sfnt_off0000f4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C6 10624 bytes
SHA-256: 6a84e50a82f40453c38db197e4ee44e60dd48d89ba4fcab7f7ae4da61be3010f
font_02_sfnt_off00010d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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