Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e295f2c5db61f1…

MALICIOUS

PDF

78.5 KB Created: 2021-04-13 19:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0176f856cf6b2043bfe728c4a7f355ed SHA-1: e785693190b2ca4dc710211e503f52d8e09edba1 SHA-256: 69e295f2c5db61f134ee1b4d6d28774e4032dc3566db4815d7b02941831ca8cd
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/strik?utm_term=best+audio+setting+for+zoom PDF link annotation
    • https://cdn.sqhk.co/vuvupewog/jiqgRN7/64086366379.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/bfTjaq2/timijitaduzagitixod.pdfIn PDF document text
    • http://50offshop.info/miller_syncrowave_250_dx_tig_welder_packagehvexq.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/gc0QjhI/download_dungeon_hunter_5_action_rpg.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumirapeb/djjbHie/minecraft_world_map_download_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/fujikapoji/didrgeE/27628093598.pdfIn PDF document text
    • http://runmasten.online/534533684331suiz.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/ggDicNb/38096576389.pdfIn PDF document text
    • http://kerosijuvibeg.scienceontheweb.net/assam_university_registration_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_6037c79a46378.pdfIn PDF document text
    • http://rijexofugovu.medianewsonline.com/collins_english_spanish_dictionary.pdfIn PDF document text
    • http://pexarinolal.mypressonline.com/pdf_file_reader_download_for_windows_xp.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/hi8QtfB/vegusaganomugomawilofel.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/MS8vYgj/piggly_wiggly_kinston_nc_heritage_st.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417662/normal_603dc21611997.pdfIn PDF document text
    • https://cdn.sqhk.co/polidupokasu/DEWiqgc/16683539034.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/cJT75gp/good_beer_pong_trick_shots.pdfIn PDF document text
    • https://cdn.sqhk.co/nujudemugipi/jheghgK/best_disposable_face_masks_made_in_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/Bziajia/fantasy_football_name_generator_uk.pdfIn PDF document text
    • http://idealicacolumbia.site/kurezodonea6hkm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474978/normal_6031367247193.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/levigisolurebimawimudu.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_off0000f50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50F 5296 bytes
SHA-256: 81ff4125863aa41a012f016ee96abdc0e501d01c70178911499f444098189f23
font_01_sfnt_off00010708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10708 10956 bytes
SHA-256: 3e13fd1ae0a5bd23fd78a4d17ed45017d4edc28df2ca28f26f7f57d710b8341c

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