Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1f3de82b098831…

MALICIOUS

PDF

68.2 KB Created: 2021-02-23 10:58:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6ba6397009d0c350c9610c4ead1cd7c3 SHA-1: bbb1d4a996fa125a9a1c221d4a12a177117e22a0 SHA-256: fb1f3de82b098831f654ea95ec78d9b22a0d04930d78d277512f0996f46372ab
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/123?utm_term=6.5+grendel+reloading+handbook+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fe615f414885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487399/normal_601606abec7be.pdfIn PDF document text
    • http://uanews.website/nios_deled_marksheet_and_certificate_20193amtx.pdfIn PDF document text
    • http://the-job.ru/mirolalelw4svl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424331/normal_602f1f05a648b.pdfIn PDF document text
    • http://magicwoolshop.com/veito_blade_heater_standz1pxt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408976/normal_5ff7a78cb8977.pdfIn PDF document text
    • http://bigops.fun/xamigave9ycve.pdfIn PDF document text
    • http://lami-lashes.site/zenidepanapitiwimemabisidagpen.pdfIn PDF document text
    • http://paganel.world/what_are_the_disadvantages_of_coal_powero9rzq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_6015f31b147b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388413/normal_5ff043fb8056d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446772/normal_6029ed66d80d7.pdfIn PDF document text
    • http://walkover.me/zukutujekepabu3urx8.pdfIn PDF document text
    • http://manybigs.space/97425598281j50o6.pdfIn PDF document text
    • 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_off0000ce4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4C 5588 bytes
SHA-256: 597035a0025c2635b5ddfb4ab2368a6856c8c8d7ecedc8600e82c3026444bbc5
font_01_sfnt_off0000e14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14C 10176 bytes
SHA-256: 53fc97c42b16c72e6852d2754992e6d771e09dcae289066a8abc1b5f2f1e0113