Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f36ad1f0867323…

MALICIOUS

PDF

70.5 KB Created: 2021-02-13 14:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d4fb6b5af1b9b7114e7c063b05ca8bd2 SHA-1: b9ed0e3bfead2b3981333b13df4d77bdc2e21712 SHA-256: f3f36ad1f08673239badf4930dcd1f11f38eb3b036ad3767197cb9704f1f2b90
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/wix?keyword=editor+of+daily+guide+ghana In PDF document text
    • http://movivuvafozor.iblogger.org/asme_code_2015.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/JYifyge/strike_master_ice_augers_bait_puck.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/geTkmF3/73679455338.pdfIn PDF document text
    • http://ruroraratotu.66ghz.com/49136712949.pdfIn PDF document text
    • http://jonusawa.iblogger.org/96926830408.pdfIn PDF document text
    • http://ekzo-fruit.ru/retroarch_cores_download_pcwlvk3.pdfIn PDF document text
    • http://idealsit.fun/belanger_kondor_parts_manual9kyzs.pdfIn PDF document text
    • http://mebelintera.ru/minority_report_plot96hse.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/pyijhgk/nokizetizofu.pdfIn PDF document text
    • http://jogebavipe.iblogger.org/cpr_aed_course_answers.pdfIn PDF document text
    • https://pudoxarunisit.weebly.com/uploads/1/3/1/1/131164251/lulowagamal.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/PK3ieNf/37594894409.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kitalanexu.epizy.com/medieval_2_total_war_scotland_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/daubert_tracker_case_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/3546225186.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_off0000d833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD833 5052 bytes
SHA-256: 353482c04b477805e76d36b20f959f0d748f5b43a074b9f3e5dcaf340ccf193f
font_01_sfnt_off0000e96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96A 10356 bytes
SHA-256: 0e19e1a8558500f8ac4c645e492474abd3d9a8727ce6a4eae941346ed0960fa7