Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7804b23722a08ea…

MALICIOUS

PDF

68.2 KB Created: 2020-12-22 16:27:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 11760e35f16d1ad07efb2670d55dfbc9 SHA-1: d2fc4a1ac5e096d23814c1f6d2e0327dcde242f2 SHA-256: b7804b23722a08eae6855984f47c8dbdd6eaaa6c0e75d7e2618c7a6d7a08ff86
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting services and are likely part of a link farm designed to distribute malicious content or phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

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://trafficel.ru/strik?utm_term=maha+cartoon+tv+channel+video+mein PDF link annotation
    • https://wavamabixalovag.weebly.com/uploads/1/3/4/5/134525364/f08da3560.pdfIn PDF document text
    • https://pulepuvoko.weebly.com/uploads/1/3/4/2/134266128/b04855be47a.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/vozetovuxukelul.pdfIn PDF document text
    • https://kaxojolomo.weebly.com/uploads/1/3/4/8/134885197/8163381.pdfIn PDF document text
    • https://mutudibekakifu.weebly.com/uploads/1/3/1/3/131398274/korepuzej.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/7df34cece1d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/03ab729c-459e-478a-91c7-1cd406a0801c/ginolebekibukaduzogulatu.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/22547874055.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a954239b0722913c9654/t/5fc6c09ebfb90028be3a3a3e/1606860959262/super_tank_rumble_apk_mod_unlimited_money.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/fuwolojadawetatavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0faa61e7-1e73-4443-9d6f-5afcee5f49c2/pekezunusozami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1031fee-f34f-46bd-87d0-806fd370fd3e/4619784153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/450a8f68-566a-42fb-9853-030a6543087d/college_physics_knight_jones_field_3rd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2eebe30-f4a1-4082-a01e-bd82a4427483/17196227412.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe13b134adefb5fb852bd91/t/5fe174a623faae37ab22fda5/1608610983485/merele.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_off0000d028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD028 5068 bytes
SHA-256: 9f7a5ae1a680051b6f8e0331cdbd491304ca514a7e82af7e945e7a210432d6fe
font_01_sfnt_off0000e148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE148 10152 bytes
SHA-256: e0578146fdc0ce2e187a2c1e7374b73f2ef993e48224704a92b6695602896514

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