Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4227c27c123c8fe…

MALICIOUS

PDF

75.8 KB Created: 2021-02-27 10:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f7e869cec3dc35f064b9a483765a6851 SHA-1: 0a58e4aa5ac344f4ee2c88759c41bae90da53703 SHA-256: e4227c27c123c8fe69c7e9f9c11454aee2ade19f3b7b6b48428a7dc9f8184216
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with one prominent external URI pointing to 'jottigo.ru', suggesting a phishing or malware distribution attempt. The PDF structure and embedded links are characteristic of a link farm designed to redirect users to potentially harmful content.

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://jottigo.ru/award?keyword=hp+envy+4500+e-all-in-one+printer+specification PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446401/normal_5ff811a1bf5ca.pdfIn PDF document text
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/5634821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_601fd74156834.pdfIn PDF document text
    • http://papotupeti.iblogger.org/53638219755.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/a52cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_600faedc832d3.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/arkansas_cdl__dl_testing_center_newport_ar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pudekixepubaz.epizy.com/17730524344.pdfIn PDF document text
    • http://zumebixakefeta.epizy.com/latipesupuvid.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/46520665186.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/hannibal_barca.pdfIn PDF document text
    • http://vuremekewema.rf.gd/59805112256.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/ldap_injection_hackerone_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/49368569648.pdfIn PDF document text
    • http://waraxiv.rf.gd/481701445.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/honda_small_engine_repair_manual.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_off0000eb64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB64 5516 bytes
SHA-256: 1426087d6dce850760745532b33aeb8ca29632da9ca3b2b1e9a0d14a9b218875
font_01_sfnt_off0000fe5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5D 10396 bytes
SHA-256: 0eb2cf8665dee95b9f4285f81a5425c8547e4a6e6a193b8afd9e5cb86bc1530e

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