Malicious PDF — malware analysis report

Static analysis result for SHA-256 446db0700bfefe0c…

MALICIOUS

PDF

63.9 KB Created: 2021-02-11 16:37:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c812cf13d03c6d807ec6bd7e08bc0091 SHA-1: 2e611bbba5b75eee4c70b49f094f899b64158331 SHA-256: 446db0700bfefe0ccf6e3716e669eed1ef26de04634251f2c5dc5684ba5d40a7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and appearing to be link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jacksth.ru/wix?keyword=world+history+human+legacy+modern+era+textbook+pdf PDF link annotation
    • https://mexukisigugat.weebly.com/uploads/1/3/4/7/134702857/rafekuf_mibisowerapoge.pdfIn PDF document text
    • http://visiblawty.com/2003_lexus_is300_owners_manual47571.pdfIn PDF document text
    • http://aduo5.online/conquerors_blade_steam_download_a_virustajus.pdfIn PDF document text
    • http://gramnews.xyz/wanasupikupj4.pdfIn PDF document text
    • http://chebsvet.ru/xipojewiwixozavepgh29.pdfIn PDF document text
    • https://mokoxofedig.weebly.com/uploads/1/3/4/8/134891763/demexejev_zagotibobowutu.pdfIn PDF document text
    • http://barashik.space/muzolezilixaduvazawehiwaa.pdfIn PDF document text
    • http://cardioactiveuficiale.site/bujiradijetotegabodadijv430e.pdfIn PDF document text
    • http://eurostore.info/8190304217645e3i.pdfIn PDF document text
    • http://love-cosmetics.shop/924081969698jqrh.pdfIn PDF document text
    • http://forkidsshop.online/beatport_er_hack_v1._5_free1g9p6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xupimaral/cisco_packet_tracer_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/giant_bath_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/7212134312.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/94113288786.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_off0000bc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC79 5956 bytes
SHA-256: 0334117b8557983f16a4157a74be922c4e198cb51fc78d6895cae93e93fa26f0
font_01_sfnt_off0000d0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A9 9976 bytes
SHA-256: 0a80fff2c72fe817dc33daa9a883c99bc029d3f86ba97443a1d39bdcf86a1549

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