Malicious PDF — malware analysis report

Static analysis result for SHA-256 81997098de7eca6e…

MALICIOUS

PDF

73.3 KB Created: 2021-02-16 07:01:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d93ea63bdf7997424cbb3ccebca6c83b SHA-1: e89e613bb5f54c5959a6e77c2b0770ff2bb53103 SHA-256: 81997098de7eca6e745dac1d42cde14f691be427fd6c72359f151b21f785840f
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/wb?keyword=what%20is%20the%20fish%20philosophy In PDF document text
    • http://nuxuxavolas.22web.org/fagowumomakanumipipov.pdfIn PDF document text
    • http://getveran.site/82751131416jlaa0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473640/normal_5fc5fb1253dfd.pdfIn PDF document text
    • https://ziwarojuwetupo.weebly.com/uploads/1/3/4/3/134343479/8fa277.pdfIn PDF document text
    • http://proflist-briansk.ru/expertopup_recharge_programkc18r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464527/normal_5ff4a7a7b66c9.pdfIn PDF document text
    • http://resimpub.com/gimisibulutepouc22f.pdfIn PDF document text
    • http://regse.website/onlinemeded_quick_tables_downloaec86f.pdfIn PDF document text
    • http://xteenware.online/condom_size_calculator_ukg2si9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/51952554955.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/34634112451.pdfIn PDF document text
    • http://biwewija.rf.gd/supoxivigexezodabido.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/puterufibuzujen.pdfIn PDF document text
    • http://gijabakupukuj.rf.gd/deadly_betrayal_movie_free.pdfIn PDF document text
    • http://suvuxugoboboju.rf.gd/205916163.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_off0000e4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C0 5008 bytes
SHA-256: 7fe0f1df0d1cf8e2e8944b39cd01f087901bdaefda21a636cce807385deee120
font_01_sfnt_off0000f5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 10112 bytes
SHA-256: fe357e3dcd8fbd81cd68960d8568f6018a21cdb5a825b4caee48e1a30c865e56