Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1271d81c4e0ee90…

MALICIOUS

PDF

75.2 KB Created: 2021-04-05 14:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 481846edb3757f6e04b42e5ea64ef83f SHA-1: 39b2ebbef6ce583ca78a6adcf7054b751506630c SHA-256: b1271d81c4e0ee90e6ce0258aba18abf5e14c6c7a6e1e86206ccc637797d9028
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The PDF structure and embedded content suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=solution+concentrations+worksheet+answers
    • https://cdn.sqhk.co/zudilubal/jyvhdji/xeritezofa.pdf
    • http://ogranicbio.space/black_and_decker_electric_weed_eater_gh900_manualogq73.pdf
    • https://cdn.sqhk.co/toromerepowa/gowhhih/spectacle_lake_mn.pdf
    • http://gadatoreneperil.mygamesonline.org/swka_angielski_b2.pdf
    • https://cdn.sqhk.co/fewoxenovof/UTjjrxi/fishing_break_online_mod_apk.pdf
    • http://nezowigivomi.scienceontheweb.net/antennas_and_wave_propagation_book.pdf
    • https://cdn.sqhk.co/vefusujix/gjhfihb/on_my_block_cast_spooky_age.pdf
    • http://kukushka.space/mebigixifagasakizotuzo57v66.pdf
    • https://cdn.sqhk.co/kifuzopeko/icaJibs/89635616720.pdf
    • https://cdn.sqhk.co/xagaxubibiz/YngoYic/hack_jurassic_world_tm_the_game_lucky_patcher.pdf
    • http://bupitubegedew.getenjoyment.net/personality_and_social_psychology_journal.pdf
    • http://gedozudusinap.mygamesonline.org/avenza_maps_for_windows_7.pdf
    • https://cdn.sqhk.co/bikakigiben/h9hgiaZ/tumblr_lights_bedroom.pdf
    • http://cashbackmoney.info/hamlet_act_3_scene_2_meaninghtcm1.pdf
    • http://fit-italy.space/jititopavugexerimogovirhg0fm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d88200a4-9a49-49d9-a5fd-eab023d8be0b/how_to_update_table_of_contents_in_word_2010.pdf
    • http://fonaxipovun.epizy.com/butterworths_law_dictionary.pdf
    • https://uploads.strikinglycdn.com/files/e1a1cd21-48a1-4cfb-963a-b19d3390f869/how_is_the_economy_right_now_2020.pdf
    • https://uploads.strikinglycdn.com/files/c3cff56b-8435-4e5a-9566-50f61785749e/what_household_products_can_you_use_to_clean_your_car.pdf
    • http://wasuvanibup.epizy.com/sample_aptitude_test_questions_and_answers_for_banks.pdf
    • https://uploads.strikinglycdn.com/files/48f16dbd-119d-49ac-bc54-2136ae001516/14098429832.pdf
    • http://voxagezevelog.rf.gd/latitude_e5400_will_not_power_on.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_off0000e719.bin
129ec96d0653893499d7eb611b2145090cf2f27ec48325ec758974c01f363113		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE719 5148 bytes
font_01_sfnt_off0000f8a8.bin
fecafd3c5156b4bcacb74e912e1bb0bdd344ed296b745ca17d8147c886e7734c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A8 11400 bytes

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