Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f01663e307d718…

MALICIOUS

PDF

77.0 KB Created: 2020-11-11 22:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 09cad6f62d0f50db3cc7ee40bbc24f6c SHA-1: 1165a110aa90fd0970f736e5164c4758069938a6 SHA-256: f8f01663e307d718fc2f7df82b83cc7ad1cee2a9f325cdc1593be36a33b5c1c3
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://trafficel.ru/123?utm_term=mr+rogers+9%252F11 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379851/normal_5f8f226946ba3.pdfIn PDF document text
    • https://wulenewovifof.weebly.com/uploads/1/3/4/5/134588468/niponomuzi.pdfIn PDF document text
    • https://jixepelisu.weebly.com/uploads/1/3/2/6/132695865/lavos_bukisamawipa_sutobilojunevod.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/zukukepulado.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/xekozidewotal_bunizetiko_pexukiwutiv_xeguvobudo.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/wonuvu-nufet.pdfIn PDF document text
    • https://roribevewo.weebly.com/uploads/1/3/4/5/134502196/jukoretaxoxut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_5fa7d5bb6b87e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_5fa74212091c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393911/normal_5f92451c8145d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408346/normal_5f9fcb497cf26.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/viboxikuz/kaleshwaram_irrigation_project.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eed382b0-0955-40a5-a8d2-2287a2d640ae/rujurivuwakuxegulipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a63e832e-e473-4784-bd47-a4c16d549602/hlsr_performers_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64bf1ca8-fd6d-4054-aad8-985064cbc749/96693074976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2134cb61-dd18-4d3a-b23b-b0f8c0dcd088/what_does_alias_writ_of_arrest_mean.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_off0000f202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF202 4860 bytes
SHA-256: fc607b8b342a09afe430f49a2e23df971ddd8d68f26031effb66ddab883459cc
font_01_sfnt_off000102b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B6 10828 bytes
SHA-256: 6df1fc088cb78921269c70d19a9b71e935c43d4e018242b39640dfa73f3b8d04