Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27caeebac7c9671…

MALICIOUS

PDF

105.1 KB Created: 2021-05-06 06:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0731291ec5f0cfae896a56f3e7de4e5 SHA-1: 94b7b6820252842610b9143a1192f2632195351f SHA-256: f27caeebac7c9671b4d96e17aac4f19dfe6417dfcd23147782b4a1d513a62c51
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated, but the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=johnny+the+homicidal+maniac+online
    • http://pewekelexu.mygamesonline.org/john_bessant_and_joe_tidd_innovation_and_entrepreneurship.pdf
    • http://toxipoxekej.medianewsonline.com/55142055765.pdf
    • https://cdn.sqhk.co/dekorasenu/aAKieFY/55157320753.pdf
    • https://cdn.sqhk.co/tedisebufen/63eTifh/86683833723.pdf
    • https://cdn.sqhk.co/sugefixa/ahi5oha/wusuwirapupisemopurile.pdf
    • http://jajuviramigawo.medianewsonline.com/38328819359.pdf
    • https://mabelemaje.weebly.com/uploads/1/3/4/7/134705401/segokasejoto_panizavefaduko_butexo.pdf
    • https://dovowufola.weebly.com/uploads/1/3/4/4/134438787/5782100.pdf
    • http://kujudunoberij.22web.org/xuzegawupipokasasivet.pdf
    • https://cdn.sqhk.co/nofoxanu/djighgh/toy_monster_truck_videos_on_youtube.pdf
    • http://jovepodixowofow.mygamesonline.org/zomamevorajofugogas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gixejemazob.myartsonline.com/analytical_reasoning_solving_techniques.pdf
    • http://welolazudadiv.epizy.com/koselapesusuwej.pdf
    • http://fexajorijoworas.epizy.com/bookmarklet_android_browser.pdf
    • https://s3.amazonaws.com/bejikefowu/jijizipiledog.pdf
    • http://duxunidebinajus.epizy.com/18061389555.pdf
    • http://galizojiga.rf.gd/cisco_packet_tracer_student_version_6._2.pdf
    • http://zijupowisupol.rf.gd/al_di_meola_guitar_book.pdf
    • http://rovikejovejoto.rf.gd/bansidhar_ke_video_2019.pdf
    • http://fukatotapi.epizy.com/79568439143.pdf
    • https://s3.amazonaws.com/solonebosop/esi_phone_change_date_and_time.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_off00015b36.bin
78d773c42c61c4507ec48ea3e401050336aee03f93671911bebb08bfc7c1841f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B36 4996 bytes
font_01_sfnt_off00016c15.bin
362f932fbb4f19c580a41faf3182879450b39cf180249cc3e79b9cf7c2d2461b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16C15 12112 bytes

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