Malicious PDF — malware analysis report

Static analysis result for SHA-256 8051604d3825a03f…

MALICIOUS

PDF

76.6 KB Created: 2021-03-30 17:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b78509329ff6cac4393a779aa6d4d8f SHA-1: 70bc2948f04212ce91853cd3c089bd34c67d3807 SHA-256: 8051604d3825a03f85d2858a4d70c9faa150669bc063c24201ebaa029afdefac
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file. The document body, though heavily obfuscated, contains keywords related to a game ('ducklife 4 hacked') and application names ('wkhtmltopdf', 'Qt'), suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=ducklife+4+hacked
    • https://cdn.sqhk.co/lopumilekana/UWieziN/charge_apple_pencil_with_ipad.pdf
    • http://gatowixipeba.mywebcommunity.org/84541939738.pdf
    • http://kunujunekedi.mygamesonline.org/aula_de_espanhol_em.pdf
    • http://gijaninapumobe.sportsontheweb.net/zeronemawaw.pdf
    • https://cdn.sqhk.co/jirudumom/e6ih4Up/robot_jump_over_hurdles_dog.pdf
    • https://cdn.sqhk.co/zesozote/cviahjm/township_game_cheats_android_apk.pdf
    • https://cdn.sqhk.co/muvifisi/EheNj4S/golf_digest_father_s_day_gift_guide.pdf
    • https://cdn.sqhk.co/rikopekela/hbgiDw1/86424029082.pdf
    • http://kulotufiw.mypressonline.com/fisifenuvibovazepikaboli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://damexodawu.epizy.com/fanuc_cnc_turning_programming_examples.pdf
    • https://uploads.strikinglycdn.com/files/ae72f738-840d-4f87-976c-244377d6a244/what_are_the_main_features_of_a_newspaper_report.pdf
    • https://uploads.strikinglycdn.com/files/6f1b5975-a7b5-4fe4-b499-ef49429078ab/92358800201.pdf
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_fb30beb6e65b4d0f9b233edbc9650d37.pdf?index=true
    • http://xuvekixofeku.onlinewebshop.net/how_to_cook_t_bone_steak_on_foreman_grill.pdf
    • https://3c86e5df-9a55-47dd-9d5b-c207b25ec6cd.filesusr.com/ugd/72bf36_14e69e0fe4874576bf7e88b85d40263b.pdf?index=true
    • http://jadukubilelib.myartsonline.com/kitikegorolijebo.pdf
    • https://8acf0fc4-2da8-4686-9788-d7840b5449fc.filesusr.com/ugd/fab691_c263b3cf6c4849c3bd473f107cd2e347.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a89749fd-ed50-4f80-a89c-d891bdd12090/what_is_a_geometric_formula_in_chemistry.pdf
    • https://67389751-14cc-4ed3-b660-7ef7239e4cc3.filesusr.com/ugd/bb5584_f477d7c0b73a48269b9b9bc65a745dda.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6b1f3963-3ed9-4899-b9c4-27a0e5ba8a64/is_harry_potter_suitable_for_5_year_old.pdf
    • http://gesinofafag.epizy.com/bass_boosted_punjabi_song.pdf
    • https://uploads.strikinglycdn.com/files/09b9f607-bf77-4560-bc0c-00915f6ec01f/konodifobalojumoja.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e071.bin
98f53132fa1b7d3aa3c445db372270d18e8b30a0814cdd757d9ae48a4d32cba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE071 4572 bytes
font_01_sfnt_off0000f00d.bin
a92207ad63b16c5b94ac9f9b70d4100c516bc552e4c4df88a29ecd2c2166f198		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF00D 11104 bytes
font_02_sfnt_off000115e8.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115E8 4324 bytes

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