Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2e3d31b504bf20…

MALICIOUS

PDF

74.1 KB Created: 2021-02-15 23:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: dfc1ff442aad30d8f1c56175cd586deb SHA-1: 52a9b160f8646516c52b4cd83d8e80b64bcad815 SHA-256: ef2e3d31b504bf20b06d1f73d1da180833237599c874fde2e28ce9653c9dd009
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=the+vampire+diaries+temporada+1+trailer+espa%25C3%25B1ol In PDF document text
    • https://tabupuja.weebly.com/uploads/1/3/4/6/134647436/8619369.pdfIn PDF document text
    • https://kukixagunobi.weebly.com/uploads/1/3/5/3/135325453/xaxegumimixir_sobokeriwi_tadode_gotijuronik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408180/normal_600860d1999a9.pdfIn PDF document text
    • https://gisunada.weebly.com/uploads/1/3/1/4/131409009/7440912.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410703/normal_5ffd02af23d3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460981/normal_600e0d67b8845.pdfIn PDF document text
    • https://wajovojov.weebly.com/uploads/1/3/4/6/134652085/b00b3fe6d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475209/normal_5ff5d9e8a8850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380383/normal_6023c87a48587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499942/normal_601f2abe0656d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421461/normal_600605678d919.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465392/normal_5fdda10232e8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451755/normal_6019982a340d9.pdfIn PDF document text
    • https://webimilosajepi.weebly.com/uploads/1/3/4/8/134859137/kudarovimuwuxud-dutitoza.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/060871aafa7b94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DC 5472 bytes
SHA-256: ebdb49810d6445b847ab913910ba339a3b2c20d5df85c420488e131bc7f0cc29
font_01_sfnt_off0000f50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 10808 bytes
SHA-256: bd274ed7d6f317028f769c30d7bb1e116c6a005c1c465a9c8ba3aa68a6d17517