Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab34d40834d6d4f…

MALICIOUS

PDF

64.3 KB Created: 2021-02-09 15:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 13c8d7b9ebd5971d5676b927c6e975de SHA-1: 0b757c97701a30b178c7f36cb9faf5df8544e0bc SHA-256: 0ab34d40834d6d4f873b22cc7316819a267d48f47ad3002081c4638c14055543
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable hosting, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://seumenha.ru/aws?utm_term=verbal+vs+non+verbal+communication+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366978/normal_5fee3dff19997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388820/normal_5fed7ed1e97cc.pdfIn PDF document text
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/eb0e2c95e94e.pdfIn PDF document text
    • https://cdn.sqhk.co/boketumejipa/cqjjA6f/82454831399.pdfIn PDF document text
    • https://sixikubirosepup.weebly.com/uploads/1/3/3/9/133997641/gokivasesujuwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444370/normal_6011d2a5586b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455380/normal_5fe7c3532b99f.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/gRghYFQ/bts_dynamite_mv_views_live_count.pdfIn PDF document text
    • http://mamuzomilap.iblogger.org/tovizofigotezup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gawuvuv.epizy.com/brave_browser_free_for_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/attarintiki_daredi_ringtones_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/commandos_3_android.pdfIn PDF document text
    • http://bividit.rf.gd/filmorago_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/messenger_apk_older_version.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD72 5464 bytes
SHA-256: bc19936a68cc1ba7434480070de3551eb9c7f2e86bcbe8581e218a26dff84d8c
font_01_sfnt_off0000cff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF5 10664 bytes
SHA-256: 46a729111982db4a9836af53d10696b48900a113316edd66e72dedfdc1f49ebb

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