Malicious PDF — malware analysis report

Static analysis result for SHA-256 b19b34456e25dd4b…

MALICIOUS

PDF

84.8 KB Created: 2020-12-28 17:32:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 07892cac078eccd49911f5bd78ce348f SHA-1: 82d88fdeceadd111afbb1f1ac70b77bc5f0bf5a1 SHA-256: b19b34456e25dd4b8944ffe7435f5ec8e597fd201ff181f28264ec11309788cd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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 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.
  • 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/aws?utm_term=liverpool+burnley+formation PDF link annotation
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/5237853.pdfIn PDF document text
    • https://damasixo.weebly.com/uploads/1/3/5/3/135322107/7e2b5c19926a.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/9f160a4f-07b3-4794-be20-5d086ebeb1a2/descargar_adobe_audition_3.0_full_crack_espaol_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa85c9a-049d-4ab9-ad7f-dcc529a6e9e8/77026285168.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/85260975165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00613ca0-a4fe-4903-a290-38c2020734e4/28189629286.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/danisorozuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ba5d13-093f-412c-831e-4f6c520e3c4e/98044855760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6681900-09a8-40ce-a92c-3788aa3eb542/fulobiluzejaziviborapimaz.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/diary_entry_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/lamborghini_chalai_video_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/xuveturokilij.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_off00010faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAF 5112 bytes
SHA-256: ab595a23b89c1c155f3a87dda7461a28d7327364f9932c372a3b65d913c4a659
font_01_sfnt_off0001210d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210D 11016 bytes
SHA-256: 8420c16a4fe1283617448ad2571fcaf59412a775b641a97685ba0c5f5215ef46

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