Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eec9b46be6974fc…

MALICIOUS

PDF

77.0 KB Created: 2021-02-05 13:03:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 24957666f8b99d54b7696c0f8960e1c4 SHA-1: e4ec7b98c7c0f12197fd3496d236f5700594d4f9 SHA-256: 3eec9b46be6974fc65b9eb5143eacafdf84e089f87b0c5149de27ec5e97699c9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 external URIs, including one that appears to be a lure for free movie streaming, and another that is part of a link farm on disposable hosting. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the heuristics and URLs strongly suggest a phishing or malware distribution attempt.

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/123?utm_term=freedom+writers+full+movie+free+streaming PDF link annotation
    • http://shoppermarket.online/acs_chem_2_study_guideygupu.pdfIn PDF document text
    • http://salebox.shop/451425810962vnz2.pdfIn PDF document text
    • http://fapedivojo.22web.org/nccn_guidelines_cll.pdfIn PDF document text
    • http://yoganchik.space/wuxolomajumrq9cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448096/normal_60061e2b0fb26.pdfIn PDF document text
    • http://ginenalemetuniw.22web.org/64785082397.pdfIn PDF document text
    • http://namedaun.fun/forex_trading_strategies_free_downloadyig7z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495409/normal_5ff9acdba93e1.pdfIn PDF document text
    • http://thehensleys.org/82166703773nh2ku.pdfIn PDF document text
    • http://gajozemexip.22web.org/blauj_dizain_2019_images.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://konazosite.epizy.com/vazisanerekazuzusokolal.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/80315831187.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/neutrinosx2_ps2_emulator.pdfIn PDF document text
    • http://nedepufeto.epizy.com/goxel.pdfIn PDF document text
    • http://tukozadagafewan.rf.gd/abcd2_score_italiano.pdfIn PDF document text
    • http://zomimek.epizy.com/836945612.pdfIn PDF document text
    • http://vosowetawevu.epizy.com/42152437538.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_off0000efdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDC 5336 bytes
SHA-256: 6474d26a986bf4c68012c9ce8ce569ac8f69ecd0ff07127f18eb4ea2c1599a77
font_01_sfnt_off00010205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10205 10864 bytes
SHA-256: 6167b6a24084c6525329585b8fe300a43d2e1766cfef812ae17487d6961a86df

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