Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92ad36d9be7d44a…

MALICIOUS

PDF

78.9 KB Created: 2021-01-30 15:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e7bdf20abf0d71a091ca2ce3c670b91f SHA-1: 23d289025106224f1c5b977dc627aba9c6667ab4 SHA-256: b92ad36d9be7d44a45203c279d78ff21531d40d8f7c21f35807fc8cd7f7aa959
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting a link farm or phishing lure. The presence of external URIs and the 'link farm' heuristic indicate an attempt to redirect users to external content, likely for malicious purposes.

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://druttle.ru/wb?keyword=geometry%20wars%203%20pacifism PDF link annotation
    • http://autobuff.xyz/pofibanebagepiwaneveozabd.pdfIn PDF document text
    • http://proita.fun/carve_the_mark_veronica_rothabd5s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477138/normal_5ff32b6746622.pdfIn PDF document text
    • http://ecoservice-vlad.ru/legion_td_2_groove_guide_201945pmy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450350/normal_5fe17b5fa4f30.pdfIn PDF document text
    • http://goodik.fun/ulster_football_championship_final_20198mygd.pdfIn PDF document text
    • http://larts.digital/contest_of_champions_mastery_guide_2019ml7i1.pdfIn PDF document text
    • http://grusha.space/wavusenotu7y8r9.pdfIn PDF document text
    • http://strita.space/590190956458m364.pdfIn PDF document text
    • http://keepxufi.space/72200708645wyht3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375896/normal_5fedf65b0bd15.pdfIn PDF document text
    • http://belkwigs.com/1391678380739b15.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://deburukibovip.rf.gd/gramatyka_angielski_chomikuj.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F0 5520 bytes
SHA-256: aee7d23db39028fc51651cfe4c77bea6febae7dbae4d2b206682446fef7f2e99
font_01_sfnt_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 10752 bytes
SHA-256: 696cc625ed59d2cb2d407d9bdffef359e39957725371cd5b6da7daa3db84a3b7
font_02_sfnt_off000119d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D8 16132 bytes
SHA-256: 112ed2f3b276c1926a312fcddec01859cd6956bd4218791b147ff9e829591ab3

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