Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be5ef936a39507c…

MALICIOUS

PDF

74.0 KB Created: 2021-02-25 05:17:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b5432bd4c9838e0c3b75d798cb87cbbb SHA-1: 2be67d27aabbcbe9a9da4785e5cef074f83cc84a SHA-256: 4be5ef936a39507ce4921d81c43fd9cbd4d1c3ab26a5b96dc124ef414ed3114e
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wb?keyword=are%20any%20boletus%20deadly In PDF document text
    • https://roturusuwanowus.weebly.com/uploads/1/3/4/3/134363773/98565f4d16f3e.pdfIn PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/980264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408711/normal_5fd665f78fbfb.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/kaz_humidifier_v745a_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425738/normal_5fe6db3118f26.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/rain_dial_rd_600_manual.pdfIn PDF document text
    • https://xifabaruwene.weebly.com/uploads/1/3/0/9/130969291/lusigo.pdfIn PDF document text
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/3183584.pdfIn PDF document text
    • https://xapunuzut.weebly.com/uploads/1/3/4/6/134683745/kitiwujosa_wigumoxonudem.pdfIn PDF document text
    • http://pimovanurebi.22web.org/bejojiziwagogukejudoxule.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/sazasalesidomagipe.pdfIn PDF document text
    • https://ribigitapupag.weebly.com/uploads/1/3/4/8/134887221/lodisova_popefil_xosawug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://borinalujid.epizy.com/wow_allied_races_druid_forms.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/mixefamirimaxepedene.pdfIn PDF document text
    • http://kokokifutalikop.epizy.com/juzuzeramojuw.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_off0000e54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 5048 bytes
SHA-256: 9078211bebcccfc7604bf794f0308f6bbef5ed7bc7a375aa1c7d38a4cbe0dc00
font_01_sfnt_off0000f686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF686 10892 bytes
SHA-256: 25d648aeba535235ac1a8f220ee6817e7e245b2838c7847a0dc1a90eea36b1ac