Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0df7f3a08b73a5…

MALICIOUS

PDF

69.9 KB Created: 2021-01-23 07:14:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d1874e1f88e6edc195cce4371a3a8692 SHA-1: fc0bfd459a987f5ea558543a2abee7428febfc2e SHA-256: 6b0df7f3a08b73a5284b8b08749c965fbf807f2f014e06796f827da668489801
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one to 'baarspo.ru', suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/aws?utm_term=sertifikat+akreditasi+universitas+muslim+indonesia PDF link annotation
    • https://site-1168485.mozfiles.com/files/1168485/superhero_rangers_coloring_books_for_adults.pdfIn PDF document text
    • https://site-1171584.mozfiles.com/files/1171584/47918269799.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/jjbgcJT/youth_hockey_teams_in_california.pdfIn PDF document text
    • https://site-1173456.mozfiles.com/files/1173456/sauth_movie_2018_mp4_3gp.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/dhggeu0/real_boxing_2_rocky_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/pigalixow/ejdhagi/wubexatitufudogutewebu.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/Juhbogg/boba_tea_house_menu_phoenix.pdfIn PDF document text
    • https://site-1254607.mozfiles.com/files/1254607/ashrae_90__1_2007_free.pdfIn PDF document text
    • https://dojapoxozali.weebly.com/uploads/1/3/0/7/130775013/nifawenokapukoz_pumorum_pizutuwoper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/lobusisaxoxasirozigudujo.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/3d_software_for_designing_houses_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/lagu_gratis_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/pusorejiteko.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/silhouette_kenny_g_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/ayodhya_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/air_explorer_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/24448622515.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_off0000d6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CA 5280 bytes
SHA-256: 1d5414b9e0ec36ea71f90c82e300a35c9886b3c4ba14ccae6697239a8caeb700
font_01_sfnt_off0000e8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 9860 bytes
SHA-256: 1245e3e3914246956b8be0ba91bc3787c1baa8465e58eec67531925071e8263b

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