Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c33a14fb1484b9…

MALICIOUS

PDF

69.9 KB Created: 2021-02-05 14:27:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 052bd73bd5821765b4a33b2b22ef31da SHA-1: f4e30f19149140d92a2e05194da14984aa9aa1d9 SHA-256: d4c33a14fb1484b99f99bdb1b248358bc7b1d8eb11cc2495e6d8aacd6eb893a4
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, containing numerous external URLs pointing to various domains, many of which are hosted on disposable platforms like Weebly and CDN services. The primary purpose appears to be directing users to potentially malicious content or phishing sites, as indicated by the 'Pdf.Phishing.Trojan' ClamAV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/aws?utm_term=expanded+noun+phrases+year+3+worksheet PDF link annotation
    • https://cdn.sqhk.co/kunimanujage/cdLmngd/clash_of_kingdoms_heroes_war_mod_apk_happymod.pdfIn PDF document text
    • https://xefezabegeritaj.weebly.com/uploads/1/3/1/3/131379478/43c692.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/Bjckiej/59126108910.pdfIn PDF document text
    • http://mp4.design/tumisifugenoxulotei7k4z.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/best_worship_songs_2020_mp3_downloadlwuwo.pdfIn PDF document text
    • https://fuzimisadu.weebly.com/uploads/1/3/5/3/135319831/tuzegojofu.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/VjgjjZ3/neputanoxurosobufasop.pdfIn PDF document text
    • https://mejebepagomuda.weebly.com/uploads/1/3/4/4/134494428/lenapafadodusam-vuzulupozuduleb-renikikenatup-nawubizow.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/sirarixan.pdfIn PDF document text
    • https://duragafadave.weebly.com/uploads/1/3/1/4/131438389/2574540.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/9OSGcja/takavinusoredela.pdfIn PDF document text
    • https://cdn.sqhk.co/baxalelizop/icrYjab/pog_slammers_hologram.pdfIn PDF document text
    • https://sapefesoj.weebly.com/uploads/1/3/1/4/131453354/ff5aef17.pdfIn PDF document text
    • https://pizipeko.weebly.com/uploads/1/3/4/6/134611096/886243.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/jjfhagj/free_video_editor_app_for_iphone_without_watermark.pdfIn PDF document text
    • https://tozadifoxu.weebly.com/uploads/1/3/4/9/134904498/045ce5b308.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/ghehgjc/minecraft_pe_modern_redstone_house_download.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/7240205.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/gedUJQp/tobowunowo.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_off0000d2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C7 5460 bytes
SHA-256: ba34235490fd809e26b6b42d2e282c5a8f6a4f03279d183da834f4551869cbf6
font_01_sfnt_off0000e570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 10644 bytes
SHA-256: 5c090e8b070bf06e8926977edddc47b0a84f8ef1e36bf95850d75c2e6f8b67aa

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