Malicious PDF — malware analysis report

Static analysis result for SHA-256 1642fcf9e0bdb933…

MALICIOUS

PDF

69.6 KB Created: 2021-03-22 21:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 554fb4c755889ceddd6a119026e79e67 SHA-1: e899d9f2762ee2838238532a2c548a278031ef13 SHA-256: 1642fcf9e0bdb9330ebc1aecfe71ef50c03331874d6dfb0bfecb5072887446b7
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that mimics a search result for a book, likely to trick users into downloading a malicious payload. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and the overall detection strongly suggest a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=anda+curso+elemental+2nd+edition+pdf+free+download
    • http://criticcxck.space/179431220001y2ay.pdf
    • https://kutobuxuvesoga.weebly.com/uploads/1/3/0/7/130740510/6ae408537a5e.pdf
    • http://fusobilel.iblogger.org/32840774423.pdf
    • http://securespot.ru/fupikis43tdf.pdf
    • http://copyrightviolationcenters.com/is_there_a_harry_potter_book_called_the_cursed_childcra40.pdf
    • http://lupelisizi.medianewsonline.com/design_thinking_download.pdf
    • https://xagapetudiza.weebly.com/uploads/1/3/4/6/134686513/bc92236b47b2.pdf
    • http://idealicait.website/the_new_republic_star_wars_movie2gsq9.pdf
    • http://sumemejosanavo.iblogger.org/biblia_lenguaje_actual_gratis_descargar.pdf
    • http://reduslim-shopofficial.site/switch_nintendo_bundle_uk9bzzd.pdf
    • https://zadilomevesijob.weebly.com/uploads/1/3/4/5/134581884/rebedidosuze-kubodamota.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sojufuka.atwebpages.com/80071667773.pdf
    • http://repuxatifugupi.epizy.com/autocad_2008_crack_keygen_free.pdf
    • http://vawerudarasikow.myartsonline.com/animal_welfare_act_2020.pdf
    • https://s3.amazonaws.com/rufonali/lagu_ahmad_dhani_prabowo.pdf
    • https://s3.amazonaws.com/bisapovepizaj/28320970116.pdf
    • https://s3.amazonaws.com/fedure/jalumi.pdf
    • https://s3.amazonaws.com/zifilobesumafi/ashampoo_winoptimizer_12_full_version_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf73.bin
2d4825bab6913c2174053ecbe826b655712b6f28a5f3282970786b8b531d986c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF73 5512 bytes
font_01_sfnt_off0000e22d.bin
be23fe4734a14e700a725af4f84712528479e7af74c010dcae5ad46b1d2571b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE22D 10656 bytes