Malicious PDF — malware analysis report

Static analysis result for SHA-256 b08cfcb732a98db1…

MALICIOUS

PDF

66.6 KB Created: 2021-02-25 16:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9b74edfc07856e885b72ac80fbbcdfa9 SHA-1: d97fda92c422c58878850955de4bb32a33b2ec01 SHA-256: b08cfcb732a98db16ff45eccce99fe80cda663af738164a3faaaadccc3f89e7c
186 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
  • 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.
  • 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://leonvi.ru/wix?keyword=crossword+manual+worker PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474222/normal_5fe675e9ba318.pdfIn PDF document text
    • https://pixamowogiru.weebly.com/uploads/1/3/4/5/134590731/melurefutifo-ziborami-ralatasudi.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/ehchhjb/fuxeti.pdfIn PDF document text
    • https://norenepativen.weebly.com/uploads/1/3/4/3/134315866/mixikanirepesalefo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485001/normal_5fc670c73e649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_5fe80c1a8f70e.pdfIn PDF document text
    • https://cdn.sqhk.co/luwibajik/dihqpje/37130831106.pdfIn PDF document text
    • https://powujuraw.weebly.com/uploads/1/3/5/3/135321569/fa51ddde01f.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/jdjjjL3/deraziwuk.pdfIn PDF document text
    • https://jirozonuk.weebly.com/uploads/1/3/1/6/131606844/bavufow_putomuwif.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/ZEfihha/bosuwunegufumeb.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/sumesawoxajew/89648608931.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/wooden_platform_bed_with_storage.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/79350468657.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_off0000c852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC852 5032 bytes
SHA-256: 02ed940ddc7543c894cfd3eb55fe7dc303b7813bb131b04098829289e6e81541
font_01_sfnt_off0000d960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD960 10568 bytes
SHA-256: 8cf672718db71ec1db38f3a2fad2bfeed94aa5b52fe72ff9e99e865ed88227a5