Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2721dc9e56e1d02…

MALICIOUS

PDF

70.2 KB Created: 2021-03-06 15:00:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ea63f35fac504b53e3022837d1548e71 SHA-1: 78d5b317a669cc163eb3c54bebd842b88c5d669c SHA-256: b2721dc9e56e1d024d8a394a3063c37bd82e91b919e54994df6c5f7a24542c9b
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external domains, many of which are associated with disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a social engineering attack designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://baarspo.ru/123?utm_term=central+florida+gardening+guide PDF link annotation
    • https://cdn.sqhk.co/niserutom/1Die3ib/bobutalet.pdfIn PDF document text
    • http://deflecfcvy.best/google_chrome_installer_for_desktophs2pr.pdfIn PDF document text
    • http://muldwych.com/padefafq1rg.pdfIn PDF document text
    • https://cdn.sqhk.co/zevijevam/fHt0dkj/48978513810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465136/normal_600dddba4d848.pdfIn PDF document text
    • http://sallles.ru/domino_c7_printer_manualbxrxm.pdfIn PDF document text
    • http://matrixbicycles.com/internship_survival_guide_4th_edition3vo2e.pdfIn PDF document text
    • http://silvanozito.online/missguided_delivery_passy1jmj.pdfIn PDF document text
    • http://madamzero.com/download_transformers_forged_to_fight_mod_apk_offlineypm6j.pdfIn PDF document text
    • http://lamovingcompany.com/amazon_fire_tv_photo_apptwvuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390071/normal_602f89baf1ece.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369774/normal_5fc7fedc724b8.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/tugezaduwuv.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/jXjfj02/swatting_definition_dictionary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455377/normal_5fd03f9973d49.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/lGvXiia/anesthesia_npo_guidelines_gum_chewing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_4240d1c076c6483ca32a6e64727285d1.pdf?index=trueIn PDF document text
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_f72564c253bf436491e4a821fdf664b5.pdf?index=trueIn PDF document text
    • http://zukomakiduw.myartsonline.com/dimoval.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/71876188159.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/how_do_i_set_my_dvr_remotely_xfinity.pdfIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_9b3760d0661b4672989360ffa1395f41.pdf?index=trueIn 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_off0000d2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C1 4800 bytes
SHA-256: 750ea624dcb9db8eedefc23e1e0a449d6750bafafe7d520f638ce15ca5b7ee33
font_01_sfnt_off0000e321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE321 11588 bytes
SHA-256: 38c0e42c856f6eaadcb433cf4e32a2ad6668eb4b9193c73dde1f52396fb0095e

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