Malicious PDF — malware analysis report

Static analysis result for SHA-256 599463a0b7c85a3d…

MALICIOUS

PDF

70.6 KB Created: 2021-02-25 15:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5f08ad13202da632735e63bb56977f34 SHA-1: d94aecfce19316b669c6c9a3a4c71e69571e849d SHA-256: 599463a0b7c85a3d97aecb23c06c1faa20f5cd556c9ed0607f739a63246783d4
224 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.
  • 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.
  • 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=dell+latitude+e6410+charger+wattage In PDF document text
    • http://sk-anker.ru/kavoxucf6l8.pdfIn PDF document text
    • https://gasezojilatinoj.weebly.com/uploads/1/3/1/4/131455825/7576168.pdfIn PDF document text
    • https://midusafamiriron.weebly.com/uploads/1/3/4/7/134702540/moxaxivebenezu.pdfIn PDF document text
    • http://wersita.fun/85978824076b2ev.pdfIn PDF document text
    • https://gemaxapofa.weebly.com/uploads/1/3/2/6/132681544/jomoparajeba-wosidedogarak-nalogifutaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447877/normal_602f31a510729.pdfIn PDF document text
    • http://boxberry-24.cc/american_civil_war_photos_then_and_nowwblpo.pdfIn PDF document text
    • http://2022god.com/cmd_to_repair_windows_10_bootyaj5b.pdfIn PDF document text
    • http://siondez.ru/7_principles_of_communication_pptq46p6.pdfIn PDF document text
    • http://reweder.site/62175347755o4nny.pdfIn macro / runtime command snippet
    • https://jexixixusa.weebly.com/uploads/1/3/4/3/134336138/vijali.pdfIn macro / runtime command snippet
    • https://static.s123-cdn-static.com/uploads/4495391/normal_5fecf68ce1c87.pdfIn PDF document text
    • http://umniashka.ru/horstmann_channel_plus_h27xl_user_guidex7k5i.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/bmQv7ja/46325865269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416150/normal_5fdbbc9578f19.pdfIn PDF document text
    • http://siondez.ru/7_pIn macro / runtime command snippet
    • 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_off0000d6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DE 5552 bytes
SHA-256: ee517c8d4313a8779616e2a7092c5ec55da3f4ce80baf24d9c693470268dc639
font_01_sfnt_off0000e9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E3 10412 bytes
SHA-256: b1f19ddfbc023abc834fdd4932a1a918c8daf4c15d9f8288a443f64550398481