Malicious PDF — malware analysis report

Static analysis result for SHA-256 790499c551675b2e…

MALICIOUS

PDF

68.5 KB Created: 2021-03-29 08:36:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8806d6273eafb66bd6699ef4962bc4bb SHA-1: 706717bbc8160a6dbeaaa401710503af213fa62f SHA-256: 790499c551675b2e2378b02f29f5d61945b8995e0d60d3b86ccbb2011e533e32
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://jacksth.ru/strik?utm_term=la+crosse+technology+alarm+clock+set+time', which is likely a phishing lure disguised as a search result. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=la+crosse+technology+alarm+clock+set+time
    • http://giwitap.getenjoyment.net/donupadukedumojo.pdf
    • https://cdn.sqhk.co/zitiwofiru/diepeg0/goblin_guide_gp_promo.pdf
    • http://wusator.mygamesonline.org/zenepexovumaruneweded.pdf
    • http://iceteas.space/ingilizce_kitap_indirme_sitesiix6st.pdf
    • https://cdn-cms.f-static.net/uploads/4426261/normal_5fe6663baa740.pdf
    • https://cdn.sqhk.co/vofosutuwo/ib1kian/pozitumedexadadofe.pdf
    • http://fsbsiod.com/how_to_connect_a_hp_printer_to_a_new_wifi_networko8naq.pdf
    • https://static.s123-cdn-static.com/uploads/4403937/normal_60088e9845bd5.pdf
    • http://businessmentality.com/oppo_a37f_firmware_free1jrzu.pdf
    • https://cdn-cms.f-static.net/uploads/4459777/normal_60331d1eb947f.pdf
    • http://rebelliona.online/jesufel37foa.pdf
    • https://cdn.sqhk.co/zuronenom/fgcjfJ9/voice_recorder_di_iphone_7.pdf
    • http://pumba-timon.space/lozudidupasosoz7kxkm.pdf
    • https://static.s123-cdn-static.com/uploads/4404490/normal_5ff47ad568819.pdf
    • https://cdn.sqhk.co/rebawigabog/gebgcJ7/final_fantasy_xv_royal_edition_gameplay.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/benubapopikaj/94891931382.pdf
    • https://s3.amazonaws.com/jesidofefe/2000_ford_ranger_workshop_manual.pdf
    • https://uploads.strikinglycdn.com/files/3cf2038b-c2e4-47f0-8ff9-a8428f97e91a/cules_son_los_niveles_normales_de_azcar_en_la_sangre.pdf
    • https://s3.amazonaws.com/tobaziw/how_much_a_kirby_vacuum_cost.pdf
    • https://uploads.strikinglycdn.com/files/5fcdb5d6-4f2a-4ba8-8079-6b176216423e/jupebubon.pdf
    • https://s3.amazonaws.com/zufojadibi/mejusuzuwewovodimoka.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_off0000cb71.bin
b8f0f98193098b5d65653c176c5a93704e562ea6ca619d39cf3b0190c990a987
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB71 5320 bytes
font_01_sfnt_off0000dd6b.bin
e1afaa76a3c6f19952a29395baffb8c4fc36351e5c633bfc321781b3be8e6c9d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6B 11108 bytes