Malicious PDF — malware analysis report

Static analysis result for SHA-256 76cc2d1b6508e1ae…

MALICIOUS

PDF

79.1 KB Created: 2021-03-19 22:15:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b0671c90c83ddef9de9835d31b8ec83 SHA-1: 77cac034fbb4affc75e1bc1689dd532a37cd2f38 SHA-256: 76cc2d1b6508e1ae4fa1a9368579d62d90d54c95ceb5cc0f19b5fbc30d094675
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'baarspo.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'study guide', aligning with common phishing tactics.

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://baarspo.ru/strik?utm_term=aa+12+traditions+study+guide
    • http://yourcy.com/71218004870wmojz.pdf
    • https://cdn.sqhk.co/dasofuduveje/yhdzJij/graphic_design_apps_for_mac_free.pdf
    • http://vpntop.info/engineering_mechanics_dynamics_rc_hibbeler_12th_edition_solution_manuala0a2k.pdf
    • https://cdn.sqhk.co/vizakifito/eghhfO3/barbie_hair_salon_games_to_play.pdf
    • https://cdn.sqhk.co/wokowuvawuz/iTzvha5/71956839854.pdf
    • https://cdn.sqhk.co/zejegure/TAnxuih/biharmasti_in_chhath_song_2019.pdf
    • https://cdn.sqhk.co/xozawimepod/iiUjbTa/75057916249.pdf
    • http://callipakk2.site/the_telomerase_effect_drive_safedw4tj.pdf
    • http://coolvdomaion.online/92939624902mh238.pdf
    • https://cdn.sqhk.co/wogefosa/gVBiejh/biwinitika.pdf
    • https://cdn.sqhk.co/tipefimex/7Hd4Vgf/artisan_sourdough_sandwich_bread_recipe.pdf
    • https://cdn.sqhk.co/fagisuxupinu/iicheid/sloth_bear_habitat.pdf
    • https://cdn.sqhk.co/varipivokil/qhcgccO/hollywood_action_movies_full.pdf
    • https://cdn.sqhk.co/pemoxeriko/gjCwj0s/luke_bryan_build_me_a_daddy_mp3_download.pdf
    • http://50offshop.info/movie_box_jailbreak_ios_1150847.pdf
    • https://cdn.sqhk.co/gufuluzibos/DRigheu/47251301780.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c923531c-fe2d-4220-a689-b9df6a21817e/why_are_there_poor_and_rich_countries.pdf
    • https://uploads.strikinglycdn.com/files/b2842a22-4cd2-4da1-b257-44b1360d8fb6/systems_engineering_process_description.pdf
    • https://uploads.strikinglycdn.com/files/e56d0018-7424-4e49-9823-63cf7d26de3d/farivotejevazodoj.pdf
    • https://uploads.strikinglycdn.com/files/d652b08d-6343-4f0d-aaa3-d25b42ab40e3/how_to_play_24_hole_harmonica_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/c2b596db-d844-49c5-8c27-c4ba30c81d09/36244038250.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_off0000f6e4.bin
8d7b1e6ac7a1e3adf21bd35e110811cbd5e3b88324747aeca4dddc87217b6dc0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E4 5236 bytes
font_01_sfnt_off000108d2.bin
f4e849e69e346c35a805b50291d1d14f2353e5386cb95ebbdb1d63f0437596d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x108D2 11324 bytes