Malicious PDF — malware analysis report

Static analysis result for SHA-256 f571c3892b6f00f5…

MALICIOUS

PDF

63.1 KB Created: 2021-02-09 11:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e15d7e2d991f88fa861d4e082bdbe7a9 SHA-1: 1226f8238e86ec68d44d4afae8f6f4f021e0ecbf SHA-256: f571c3892b6f00f5f5e4eaa58658b071c03ae44779d33c2b60dc7c6171a59cfe
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/aws?utm_term=judaai+badlapur+video In PDF document text
    • https://cdn.sqhk.co/nimabugokofa/2jaBje7/classical_music_for_babies_in_womb.pdfIn PDF document text
    • https://xuzizalebu.weebly.com/uploads/1/3/4/7/134772475/9716886.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415327/normal_5ff3af68cf8ff.pdfIn PDF document text
    • https://legaxebojidonet.weebly.com/uploads/1/3/0/7/130775342/1963783.pdfIn PDF document text
    • https://ditoleruv.weebly.com/uploads/1/3/5/3/135345680/802501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5fd643a47be3f.pdfIn PDF document text
    • https://tabanaxil.weebly.com/uploads/1/3/1/8/131857193/pezis.pdfIn PDF document text
    • http://xumukekuvag.22web.org/isoniazid_toxicity_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445326/normal_5fcf0d8c6d989.pdfIn PDF document text
    • https://cdn.sqhk.co/poladejug/ajbzNii/novisezikegalalubo.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/TTjXyED/bowling_green_christmas_events.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fujesotes.epizy.com/82088479814.pdfIn PDF document text
    • http://wojixefem.epizy.com/wofop.pdfIn PDF document text
    • http://sufumawug.epizy.com/baadshah_telugu_hd_video_song.pdfIn PDF document text
    • http://xajokaxakubif.rf.gd/39816712736.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_off0000b9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E9 4964 bytes
SHA-256: db1c1fab4042c43ec496fc3be7f66cca0669767e0702aee6d2a1987a4f0c9dd1
font_01_sfnt_off0000cadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADB 10884 bytes
SHA-256: e3459b061617fc080dcec3e6a6dac1121eccb2f060ede55a1de6e8a093bbda39