Malicious PDF — malware analysis report

Static analysis result for SHA-256 f706c4522431a5e1…

MALICIOUS

PDF

76.0 KB Created: 2021-04-15 23:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 264d15198fb1688eff44c38b7f7d4d4c SHA-1: a9104668d7a34afd8d49852af83d49516bf050ec SHA-256: f706c4522431a5e131d87e5a2da3b7554cd375623d70b7fe61a79907f95f8915
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate it's designed to redirect the user to a malicious site.

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://zajinet.ru/strik?utm_term=amcor+portable+air+conditioner+not+cooling
    • https://cdn.sqhk.co/notenirikev/Oieij1b/agneepath_picture_ringtone.pdf
    • http://sogeromepagux.22web.org/benim_hocam_tarih_video_ders_notlar_2020.pdf
    • http://xiruzox.mygamesonline.org/carmilla_sheridan_le_fanu_english.pdf
    • http://befujukipepejem.mygamesonline.org/definisi_agama_hindu.pdf
    • https://cdn.sqhk.co/gazegarov/uKeCjaA/nitazofedediva.pdf
    • http://jaderulax.22web.org/21170458569.pdf
    • https://cdn.sqhk.co/mosugukasiba/iikeihL/30861124988.pdf
    • http://gedadekenoz.mywebcommunity.org/bagoz.pdf
    • https://cdn.sqhk.co/pininipata/aBgifdG/hack_vang_shoot_strike_war_fire.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tofujuwo.onlinewebshop.net/vamejemivaze.pdf
    • https://s3.amazonaws.com/dibedamoka/hiragana_sentence_worksheets.pdf
    • http://benamow.myartsonline.com/how_to_clean_printer_nozzles_epson_dx4400.pdf
    • http://tiluxusimutine.atwebpages.com/our_god_reigns_chords_israel_houghton.pdf
    • https://s3.amazonaws.com/zazelujeju/71821600343.pdf
    • https://s3.amazonaws.com/xisefowu/spanish_learning_books_for_beginners_free_download.pdf
    • http://zesivukawavomu.rf.gd/95911062533.pdf
    • https://s3.amazonaws.com/dovulavavo/87516293071.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_off0000ec4e.bin
04999f7b3d035743a3a8e1a73831461fb20f5d0f937042f06de70927ec7c1860		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4E 5344 bytes
font_01_sfnt_off0000fe5c.bin
e91b53118941904583d573363711aa797edd22360e02f77d6e7a87c7c9214cc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5C 10636 bytes

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