Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f5f69cc1c9ef68…

MALICIOUS

PDF

74.6 KB Created: 2021-02-23 00:34:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 10d0e44025401d225585a638cefe2f94 SHA-1: 8d96294e650b795d2732629d23022ff689c8bcfb SHA-256: c6f5f69cc1c9ef684ad00588369ff1ce745c963ba3b2e0ffef0a23cf33ed8b1d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://crophysi.ru/123?utm_term=amazing+fantasy+15+highest+price PDF link annotation
    • http://hookup666.site/born_a_crime_summary8hfbw.pdfIn PDF document text
    • http://zifirarukax.22web.org/15077795404.pdfIn PDF document text
    • https://nukanepinax.weebly.com/uploads/1/3/1/4/131454046/mapekebegonewo.pdfIn PDF document text
    • https://wururozudarorar.weebly.com/uploads/1/3/1/3/131380521/9321035.pdfIn PDF document text
    • http://shop-profildoors.ru/video_player_download_for_windows_vistamunw3.pdfIn PDF document text
    • http://copyrightproblem.com/39449565574tw12u.pdfIn PDF document text
    • https://fiwozipuwawew.weebly.com/uploads/1/3/0/8/130814157/8923210.pdfIn PDF document text
    • https://fepepifufom.weebly.com/uploads/1/3/1/8/131872298/8faea29b70.pdfIn PDF document text
    • https://dusaxufar.weebly.com/uploads/1/3/5/3/135327992/2a85657016b2bc7.pdfIn PDF document text
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/8001115.pdfIn PDF document text
    • https://mixabukosi.weebly.com/uploads/1/3/4/4/134479433/tonedofopixu-subikaxigefased-zegitoga.pdfIn PDF document text
    • https://xubidanata.weebly.com/uploads/1/3/4/8/134895671/fopane.pdfIn PDF document text
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/jolot.pdfIn PDF document text
    • http://yoganchik.space/construction_europenne_cm2rph1m.pdfIn PDF document text
    • https://jetosopotow.weebly.com/uploads/1/3/4/0/134018613/4778083.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/xidazeze/bukhari_sharif_arabic_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/bemobedokomesonebefe.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/kigidikodujibevekufo.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_off0000e6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DF 5712 bytes
SHA-256: 5e4ee4fedc650b821b88b6e44c9f5b7cb77eef89c6375beb81c8e7f9edec3c51
font_01_sfnt_off0000fa48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA48 10296 bytes
SHA-256: b7733a87431848611e9924d3a61a6f6a8553aae6fc9fd74076bb2409fdc13fb8

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