Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00713f5bc3ebe35…

MALICIOUS

PDF

76.7 KB Created: 2021-02-12 03:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6332e71dc408a149d5bbe0c4f6551dbd SHA-1: 9383e488d5fc7fe57018bdc59668aa5058c9033a SHA-256: c00713f5bc3ebe35fac1d6af2cef2074b3566e10244a54656dad570a9964d981
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic score indicating it functions as a link farm on disposable hosting. One prominent URL, 'https://baarspo.ru/123?utm_term=eldritch+spear+5e', is directly associated with the malicious classification. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attempt, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=eldritch+spear+5e PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493917/normal_5fda7f620dafa.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/hihjWkM/mibariredipef.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/giFjdKe/dark_souls_2_lucatiel_quest_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461481/normal_600013e0a71a5.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/2gd6ihO/rowdy_city_wrestling_mod_apk_unlimited_money_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mojafefegamo/iagc5AB/93225800471.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/1wihJif/68361922082.pdfIn PDF document text
    • https://cdn.sqhk.co/bivosozos/vibspjj/large_plastic_electronic_project_box.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rerivumisiso.rf.gd/bell_s_palsy_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/creative_cloud_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/austria_student_visa_application_form.pdfIn PDF document text
    • http://rokusagotigenov.rf.gd/texararune.pdfIn PDF document text
    • http://kuwopugivowivo.rf.gd/amman_kovil_kizhakale_songs_tamilwire.pdfIn PDF document text
    • http://vevosewis.rf.gd/jewesujatuzivufoveraw.pdfIn PDF document text
    • http://vatifijagix.epizy.com/46632333621.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/avengers_1963_comics.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_off0000f195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF195 5240 bytes
SHA-256: d98b0018589b328ca158f85dfdd6d1798a3a2e5d592583a9cd6a83b51e3e72d2
font_01_sfnt_off00010360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10360 10052 bytes
SHA-256: 9be953ba2ea6251f26ce447863717c76331490ba44b1f528a1ee3614e02ffe0a

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