Malicious PDF — malware analysis report

Static analysis result for SHA-256 7553ffb4335a3c15…

MALICIOUS

PDF

72.7 KB Created: 2021-02-12 18:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 077041e628e341fd8c08cbc39e35f455 SHA-1: 5abeb1fda7cb89044196bd7d8348d2b13f9f2ccb SHA-256: 7553ffb4335a3c15fdac12690785dc4ac901a3ef7286c517bc6bd408f5127ff4
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://yafferge.ru/wix?keyword=regal+movie+theaters+san+fernando+valley In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5fd9c04991cbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484807/normal_600a70024a734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427105/normal_5fdae153b1ff9.pdfIn PDF document text
    • http://lenorimageb.iblogger.org/90789387618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457838/normal_6010366127aee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478669/normal_600dbfcb96743.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421208/normal_5fdd63349983a.pdfIn PDF document text
    • http://pubaninuw.22web.org/bengal_tiger_tamil_full_movie_tamilrockers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481173/normal_601e6949f182e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385617/normal_5fdf33d595474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422390/normal_5fdbb510806c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_60153f395b29f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piwefijegiv.epizy.com/berijobarubagumekozavuga.pdfIn PDF document text
    • http://zobawukesilebaf.epizy.com/directions_worksheet.pdfIn PDF document text
    • http://pinakebe.rf.gd/overhead_absorption_costing_example.pdfIn PDF document text
    • http://kokexaxuseru.epizy.com/kgb_archiver_for_pc_windows_10.pdfIn PDF document text
    • http://toguxekedufu.epizy.com/12772696003.pdfIn PDF document text
    • http://suvowafavij.epizy.com/android_auto_apk_july_2019.pdfIn PDF document text
    • http://jojudodadanu.epizy.com/action_games_for_windows_7_pc.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_off0000dd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3C 5488 bytes
SHA-256: 12b8a94f666cf232a6ec3000363b5a0e573038c0fe32ea8172819ffcb265d93e
font_01_sfnt_off0000efce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCE 11088 bytes
SHA-256: 6e89e38b56dfcdc0b55a5dd95127f5ab7c869ceac81e304eaf4ae9a88cbed99f