Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b3aa2ac08c6f8a…

MALICIOUS

PDF

71.1 KB Created: 2021-02-28 16:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 238a4e28ce6afc7b946d4a3ef4f2bfeb SHA-1: b7062d193347c32842fd1cf5df8cb006d139c118 SHA-256: 74b3aa2ac08c6f8a3cc05d623124d155ff018bac5be7138962ba54c0a3d676f8
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/wix?keyword=safety+first+guide+65+expiration PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387711/normal_5ff007640f39a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384822/normal_6028554c37890.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425772/normal_60148aeb03a9a.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/what_film_to_use_for_olympus_om_10.pdfIn PDF document text
    • http://befodafojedugan.22web.org/dujukafubipatojezubave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450719/normal_5fd388111adae.pdfIn PDF document text
    • http://natalonofawoba.22web.org/talidemegazufiriwuvomuvo.pdfIn PDF document text
    • https://tudiputowol.weebly.com/uploads/1/3/1/4/131452732/turexesotewoxuwodisa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sutexuvidag.myartsonline.com/what_qualifications_do_i_need_to_be_a_vet_assistant.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/international_transport_forum_road_safety_annual_report.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_off0000d8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E4 5728 bytes
SHA-256: 0d41396f21a5eaba7331b1570b66ea83f7a81bf39b9f88133df0c58eb785edac
font_01_sfnt_off0000ec88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 10368 bytes
SHA-256: 05c2ff7b778fe437486bfde4c80aefc858e2e2a84601e7156504e208ae4c4aa3