Malicious PDF — malware analysis report

Static analysis result for SHA-256 a390e3856957fc18…

MALICIOUS

PDF

69.5 KB Created: 2021-02-25 16:36:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 92fc7787663d0618aca35bd7d0b87929 SHA-1: 0fc3e0f379ef59afb68d3c4c30fec0859e8136a2 SHA-256: a390e3856957fc182e05b7bdeae9c5dc0cad36fa922497b146a44ad704138e32
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=sig+sauer+p229+holster+left+hand In PDF document text
    • http://avbox.org/twistee_treat_hours_goldenrodk7koo.pdfIn PDF document text
    • http://masexuzijavigap.iblogger.org/75449610617.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/juzimolulifud.pdfIn PDF document text
    • http://doucheop.xyz/xesupu7hotn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468261/normal_5fe6a16142146.pdfIn PDF document text
    • http://50offshop.info/284605680302af0g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418197/normal_60200ba72522c.pdfIn PDF document text
    • https://nirejabepifu.weebly.com/uploads/1/3/4/2/134266024/8274006.pdfIn PDF document text
    • http://kifenefazujiz.iblogger.org/kuwugijunigunemomutame.pdfIn PDF document text
    • http://didazema.mypressonline.com/software_development_manager_salary_seattle.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/south_indian_love_story_movies_dubbed_in_hindi_list_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388412/normal_5fee7c3e7cfd2.pdfIn PDF document text
    • https://kinumefiboposif.weebly.com/uploads/1/3/4/8/134865532/dofig.pdfIn PDF document text
    • http://natnat.fun/vekenenesedaworubo7ap3g.pdfIn PDF document text
    • https://xifekuvazunavel.weebly.com/uploads/1/3/4/7/134748582/83c1539f2.pdfIn PDF document text
    • http://workmonster.net/finuxpz90r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zifezerolivuba.epizy.com/github_cheat_sheet_owasp.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/read_the_handmaids_tale_book.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_off0000d16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16C 5692 bytes
SHA-256: bcbd712c15b4cea9185a3b3edead5b872c47d0f985b7e6e80aa49bee05f658a0
font_01_sfnt_off0000e4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CB 10124 bytes
SHA-256: 0900e246b9821a0d43595180cc19b9df745454701334b677b26cd64903366a56