Malicious PDF — malware analysis report

Static analysis result for SHA-256 40bb7f0a39147bfe…

MALICIOUS

PDF

70.4 KB Created: 2021-02-19 23:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1d93921501a4e77ecc2f67d4956a6a9c SHA-1: 721c2055859e70fbf172dd023ef364c10685712a SHA-256: 40bb7f0a39147bfef9bc828d037ece080888632199d70611ce55972ac2e16823
184 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=fritz+and+waldo+von+erich In PDF document text
    • https://static.s123-cdn-static.com/uploads/4475734/normal_5fc754efc577d.pdfIn PDF document text
    • http://igbusinessabouthelp.com/craigslist_los_angeles_cars_truckshx3rl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495042/normal_5fcd3996ef238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455898/normal_60289365a608a.pdfIn PDF document text
    • http://wufutawolemipa.22web.org/juegos_de_mesa_hombres_lobo.pdfIn PDF document text
    • http://kudijajipiwi.iblogger.org/where_is_the_model_number_on_a_whirlpool_washing_machine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458132/normal_5fda65536db2b.pdfIn PDF document text
    • https://fetepidema.weebly.com/uploads/1/3/4/6/134684810/0019b121c02d.pdfIn PDF document text
    • http://supernefritroller.xyz/best_dryer_sheets_to_keep_mice_away0txhf.pdfIn PDF document text
    • http://rigipufefe.iblogger.org/conjugate_guide_in_french.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367271/normal_5fcf7485d2ad1.pdfIn PDF document text
    • http://tavaxibewoposo.iblogger.org/nunatuxugegokavujokabe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sujetokotew.rf.gd/jaipuria_hospital_jaipur_lab_report.pdfIn PDF document text
    • http://dojiseb.epizy.com/45211398564.pdfIn PDF document text
    • http://mapimepokojanut.epizy.com/dynamic_stretching_chart.pdfIn PDF document text
    • http://vuxotuketut.rf.gd/34157650976.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_off0000d838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD838 5004 bytes
SHA-256: 36491fc579ea747f8c1d2dd7e1a8a1be5d949352eacdea66b63bb3514ebfb692
font_01_sfnt_off0000e957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE957 10308 bytes
SHA-256: 8b263fc4fd6c7f3e9d7899603def38f14660cddc0452cdcdab214db57d82030d