Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1f829c5e68ae10…

MALICIOUS

PDF

83.3 KB Created: 2021-03-17 00:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a0b9339aba06f6ca4b73b873d61f028c SHA-1: 26f84bfe66fdd32515670e1d531d216f946ddcc4 SHA-256: fe1f829c5e68ae104a2c369a7163963dc864da82645027d91fc20d1a43b1a4cc
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to various domains, many of which are disposable or suspicious, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, appears to be a lure related to a 'lab report conductometric titration', intended to trick users into visiting these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://fokemale.ru/123?utm_term=lab+report+conductometric+titration PDF link annotation
    • http://ideal-it.fun/1021991160pcypj.pdfIn PDF document text
    • http://tryici.xyz/garefilopozewiu3qlv.pdfIn PDF document text
    • http://100p-f.ru/57335352680yhq7v.pdfIn PDF document text
    • http://krokoboko6.xyz/preschool_mom_worksheetsba17s.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/cuales_son_los_sintomas_de_problemas_cervicalespjhbo.pdfIn PDF document text
    • http://gdztut.com/89715245195ar6e.pdfIn PDF document text
    • http://pycnidwzxc.info/vooks_promo_codemqfaf.pdfIn PDF document text
    • http://instapriz24.site/what_to_pray_for_when_someone_diesp7elj.pdfIn PDF document text
    • http://strahauto.website/kuviroveajwuk.pdfIn PDF document text
    • http://firstdoctor.xyz/worry_free_money_shannon_lee_simmonsqr2yq.pdfIn PDF document text
    • http://gloslides.com/843585085960h1lf.pdfIn PDF document text
    • http://wisecreditscore.info/how_many_days_a_week_do_you_need_to_work_out_to_see_resultsft6cb.pdfIn PDF document text
    • http://blognews.top/national_defence_academy_coursesibj69.pdfIn PDF document text
    • http://idealica-italiauficiale.website/namujaakz7k.pdfIn PDF document text
    • http://casser.xyz/troy_bilt_tb110_blade_sizefikzi.pdfIn PDF document text
    • http://creamwalls.online/something_someone_anything_anyone_exercisesz31ny.pdfIn PDF document text
    • http://helpverifedbadges.com/tivoriwujunoez5wi.pdfIn PDF document text
    • http://mihetos.xyz/mezegeshk3ho.pdfIn PDF document text
    • http://peludofnor.fun/imca_guidelines_for_dp_trialsdqm7a.pdfIn PDF document text
    • http://moviesaddaa.online/37259387369hjmib.pdfIn PDF document text
    • http://vuvuga.xyz/84384243372hy5fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xarozitapakegur.epizy.com/price_of_samsung_led_smart_tv_40_inches.pdfIn PDF document text
    • http://derekage.epizy.com/14768879093.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_off00010cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBA 5088 bytes
SHA-256: 97a3ffd2e5baa1ce15e02a48e3d6d6e598b27988afd30153c8fbd7813e4e47fb
font_01_sfnt_off00011de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE8 10132 bytes
SHA-256: 48a6364416f7a02599d4fd829f0a8d31facd2c30ff32f3b8c739d4c7245c9519

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