Malicious PDF — malware analysis report

Static analysis result for SHA-256 c856a935890598d7…

MALICIOUS

PDF

75.6 KB Created: 2021-05-10 21:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f95297df6f733d9bc753b685119f6fb7 SHA-1: dd1caee6fdaea163c6efe2fa840a3443ad03c0a7 SHA-256: c856a935890598d7f696bf521dd0ad8b9f4847cc9f9e58daa2559c133f5a64ea
96 Risk Score

Malware Insights

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

The PDF document contains a URL that mimics a search engine result, likely intended to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the document suggest it's designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/strik?utm_term=what+is+the+synonym+of+solitude
    • https://cdn.sqhk.co/juwafuzivega/eAhaBp0/62733758600.pdf
    • http://housefashion.ru/xowotutf7jw8.pdf
    • https://cdn.sqhk.co/vabalogu/pmQicnt/unkilled_zombie_fps_game_download.pdf
    • https://cdn.sqhk.co/sekigizakeku/ZCjaXtF/epic_games_free_games_history_list.pdf
    • https://cdn.sqhk.co/parapirer/5Lrdkgf/91413625216.pdf
    • http://gramnews.xyz/jump_rope_dudes_meal_plant14ws.pdf
    • http://fastdonwload.space/layers_of_the_sun_coloring_worksheetv8zqo.pdf
    • http://austritkfa.com/buvaxiranakb3mfy.pdf
    • http://topsol.xyz/95737794651uxrww.pdf
    • http://microbladingcertificationdfw.org/kupamukutopasirimutijebowgg8h9.pdf
    • https://cdn.sqhk.co/lilovenodi/H0D6jc5/webtoon_canvas_awards_winners.pdf
    • https://cdn.sqhk.co/lisutovudaf/3jfkhbb/how_long_to_charge_apple_watch_series_3.pdf
    • https://cdn.sqhk.co/ripalufix/KRFjgu9/87117303827.pdf
    • http://aarbuz.space/fasutuc7pk1.pdf
    • https://cdn.sqhk.co/raxavetaletu/giieNjf/14694579011.pdf
    • https://cdn.sqhk.co/vakusukereju/avghMhd/89343379623.pdf
    • http://spencermcman.us/controlling_leaf_footed_bugs_tomatoesfqqfr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/resixexi/breakup_status_video.pdf
    • https://s3.amazonaws.com/woberiz/javascript_convert_base64_to_file.pdf
    • https://s3.amazonaws.com/wujafivabipo/nujijejigavemupo.pdf
    • https://s3.amazonaws.com/nunakixuma/emulator_android_mobile_legends.pdf
    • https://s3.amazonaws.com/seriposuj/creative_writing_assignments_for_middle_school.pdf
    • https://s3.amazonaws.com/devuxuzejozam/bejezirofidoxop.pdf
    • https://s3.amazonaws.com/kozibowisenatu/dokovugovekovebijubep.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_off0000e74a.bin
c45f3b72168bd5e760dfd934dcf1efe3210223692afe0223fe685b6218f1e0a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE74A 5168 bytes
font_01_sfnt_off0000f8cc.bin
f74cbe33b3a3ecc54312511f8f7c1a978410aa7cdc9650f77d2bb56aaa0b09cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CC 11380 bytes