Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4272472c147f64…

MALICIOUS

PDF

84.3 KB Created: 2021-05-17 00:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4db88950708033ae674b056c1cc633f3 SHA-1: 7d0afb4c001cd4a6683c082948dd77a44071e8df SHA-256: 9d4272472c147f640500393bf7c30378d69ab77b1f736c65d8857161b7cb3353
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are dynamically generated and point to SEO-optimized content, indicating a link farm designed to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=2007+pt+cruiser+automatic+transmission+problems
    • http://kvyovk.xyz/2010249030742l5i.pdf
    • https://cdn.sqhk.co/zogobadakedu/cggiiin/romazosolo.pdf
    • https://mobonojijokatu.weebly.com/uploads/1/3/4/3/134320628/bb9a68e193de.pdf
    • http://apsmall.space/ice_cream_vs_frozen_dessert_case46ezh.pdf
    • https://cdn.sqhk.co/dukoredod/ghigVep/don_t_rush_dababy_remix.pdf
    • http://activa-fb.com/air_brake_system_report9fx97.pdf
    • https://cdn.sqhk.co/joremeve/Uhfhfjb/21983436423.pdf
    • https://zoroxazug.weebly.com/uploads/1/3/4/6/134614170/tumukukagatatu-wurufamivex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/b7dbf0d7-fbd6-4e1c-9106-943f9bf56fa1/fijesizubasawed.pdf
    • https://uploads.strikinglycdn.com/files/5522922a-d8bf-4b81-a136-c2ef9d3af57c/14349950488.pdf
    • http://kosiwamirofakad.rf.gd/zovibuxolupokerubiravaf.pdf
    • http://jesebikalag.epizy.com/brain_teaser_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/89053548-ab1c-46ad-97e4-62761b8367d5/simmons_sd7k_review.pdf
    • https://uploads.strikinglycdn.com/files/38bf362d-b11d-42b4-850a-4a2711a99ed7/what_is_aggregate_capacity_planning.pdf
    • https://uploads.strikinglycdn.com/files/764adf20-f83d-4814-a2ab-9f4146ee776a/52955836167.pdf
    • https://s3.amazonaws.com/davolazupivowi/30418962585.pdf
    • http://tuzegonu.rf.gd/22390268938.pdf
    • http://gevogorusitaw.epizy.com/2020_calendar_with_holidays_printable.pdf
    • https://s3.amazonaws.com/likerajatob/bupanogepeled.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe26.bin
1c2c42930d414138233cd35e9880aae7a2d6a108a9d70fd08eae2e406872a331		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE26 5360 bytes
font_01_sfnt_off00011038.bin
df8c8a8808c7e980ed0b4176fbc3e631d89c75217ec072f26678d6417f863dc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11038 10344 bytes
font_02_sfnt_off000133c5.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133C5 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.