Malicious PDF — malware analysis report

Static analysis result for SHA-256 d50b75cf83661d65…

MALICIOUS

PDF

77.9 KB Created: 2021-02-28 05:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fa5ae2bbfe0ebb019f317470d34bcca6 SHA-1: 584c76914715c92ca8a6b78ec498c908f6569d9b SHA-256: d50b75cf83661d655c520d800ee4627f1c53664133b68e6cdb1a17079ccce04e
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to drive traffic to various sites. The presence of a specific keyword in one of the URLs suggests a potential SEO manipulation or phishing lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

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://resalured.ru/wix?keyword=pokemon+x+emulator+games PDF link annotation
    • https://cdn.sqhk.co/kogewole/g7FA6ks/swot_analysis_template_freepik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443598/normal_5ffda88ba7f15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380701/normal_60075f0cb635d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421336/normal_6025f53f9fadc.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/TgjEmib/spaceflight_simulator_pc_controls.pdfIn PDF document text
    • https://cdn.sqhk.co/dobexesi/bijchfK/xaxijivamugalopunovoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382613/normal_6029c9a629de7.pdfIn PDF document text
    • https://kisujaxu.weebly.com/uploads/1/3/0/7/130775962/4d97b5813.pdfIn PDF document text
    • https://cdn.sqhk.co/zofukumane/ouogfgj/space_invaders_atari_2600.pdfIn PDF document text
    • https://zaxewunatomilar.weebly.com/uploads/1/3/4/1/134131499/bufawafusumewog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489407/normal_600b155d2d325.pdfIn PDF document text
    • https://rofikilidoxomuk.weebly.com/uploads/1/3/4/0/134017179/kijuzip_jorike_fixifujulel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478928/normal_5fe6ef853b7ff.pdfIn PDF document text
    • https://damobupakul.weebly.com/uploads/1/3/1/4/131453350/4a7007afea43cd9.pdfIn PDF document text
    • https://bidumijedurazi.weebly.com/uploads/1/3/1/4/131437194/8127745.pdfIn PDF document text
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/9f789674cf550.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzagile/ifnhhhi/knowledge_is_power_quote_foucault.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_5fd906d315b25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413712/normal_6003ecba149eb.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_off0000f347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF347 5140 bytes
SHA-256: 6d273a34800d3c5e0daa84176ec18430fa95ca7d80bfff95f2bf97f5abd89bf6
font_01_sfnt_off000104b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B3 11100 bytes
SHA-256: 8870198322c6d8ec1c882ac9aa7d34edf0d7971c0b252799490a292842b17abf

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