Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e245607071cb186…

MALICIOUS

PDF

93.0 KB Created: 2021-03-18 13:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 476f7f1f9e3a81acd8ba60a0d587d199 SHA-1: 8fb505b509af8391504e462548a9f62092cabe7a SHA-256: 8e245607071cb18609b8d09626681ff3e31a1f1fdc4913154e09c8bdb6d8bd9d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • 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 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://nipisod.ru/strik?utm_term=cyberpunk+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/nosimasiv/kgctZ12/simolupexetadusa.pdfIn PDF document text
    • http://rameautbxy.space/powoxw7ixh.pdfIn PDF document text
    • https://cdn.sqhk.co/meletadugox/mSyYeCg/galvanized_sheet_roofing.pdfIn PDF document text
    • http://meetly.space/best_pl_sql_tutorial_for_beginnersxxicm.pdfIn PDF document text
    • http://qrastenmap.online/mason_park_rulesgujlp.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/jeThjib/66059381746.pdfIn PDF document text
    • http://nefritthebestthing.site/tujutec3rkk.pdfIn PDF document text
    • http://helplnstagram-confirm.com/gangstar_mv_original_copy_apkcayjx.pdfIn PDF document text
    • https://cdn.sqhk.co/julukijowi/iJ3hcou/gb_whatsapp_v_7._20.pdfIn PDF document text
    • http://tapagigozi.medianewsonline.com/bakifugeziwodupugavixawe.pdfIn PDF document text
    • https://cdn.sqhk.co/baxikomo/eidrkid/crashing_season_2_uk.pdfIn PDF document text
    • http://devlp.design/90627761781u15ck.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/QiaA11q/weekend._com_app_reviews.pdfIn PDF document text
    • http://lalat.space/jilanezumufibiwufokuvjxow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lonesopuw.onlinewebshop.net/35651239134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94583e7d-d700-4eed-9bc6-b77a15752465/loburupin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a68b846-e42c-4556-a328-55fbff5ee9de/judoxosipatisalu.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/10446301063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e8e92a-6801-4876-85ce-ff2d1d834dcd/nitagekopixejope.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001234f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234F 4860 bytes
SHA-256: 3aa65c2e9b552302eab609765ccbafcc9a57445db19e09dd598dcaab57277247
font_01_sfnt_off000133de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DE 10900 bytes
SHA-256: 667d5832b71672c3ba1fdb450bdcae83b0d7ffae3270f9ff6a1c30bc5dde4065
font_02_sfnt_off0001593f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1593F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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