Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4dec90b1024e26…

MALICIOUS

PDF

82.8 KB Created: 2021-09-03 06:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2c78b6646a450a98b1cecfb0c10fb4de SHA-1: 9f791b9b628605c5f5c63ca46224912c2eaeb75c SHA-256: ed4dec90b1024e26f17f3c37449bd6915b172bc63a2a53d634862e30803f68fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various domains, many of which are flagged as link farms on disposable hosting or point to compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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 http://ud2-140.com/files/bekapezegoxipote.pdf In PDF document text
    • http://weifong.tw/fckimages/file/1500773361.pdfIn PDF document text
    • http://richardarnoldalumni.com/clients/a/ad/ad1dcfa6f69ac51e3fe6bec18f6cf6d6/File/414313119.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848ad07d08a---958035523.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/19645364496.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/nuduzaxujegerekuteb.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/52578907238.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2014cd62d---nilumuvomagiroxuj.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/kapavis.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/87879503403.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/c10b8b00d4e452b0b86812402c0f36bc/43517522511.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3bf9d0b3ed---98564483009.pdfIn PDF document text
    • http://abnicum.com/files/file/damozumajavatagefadapovol.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/xalulesegixajefe.pdfIn PDF document text
    • https://ginecologmuresan.ro/ckfinder/userfiles/files/zidenukatazo.pdfIn PDF document text
    • http://webinside.pl/userfiles/file/41136594967.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f72be9a57---57461083816.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/48783071565.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b838bb739---zutodajafapodabonudidizun.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/16/file/20210516_023722_144.pdfIn PDF document text
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gobepukidejejojexike.pdfIn PDF document text
    • http://hkacca.com/userfiles/31040306632.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b914e3ecbf4---31033775164.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/31445150248.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=botany+syllabus+gauhati+university+pdfPDF 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_off0000dbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 11248 bytes
SHA-256: 2e0289d07de0a1085b539aab9c605b239311568a56ab8ab14b3ec3e62d73a7ab
font_02_sfnt_off00010ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDC 18368 bytes
SHA-256: ae75ac42965d6e27e5a5ad1ba1ba646d2edca97e24f044d5e2fafb4d55bf58cf

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