Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a828c323c21cf72…

MALICIOUS

PDF

167.2 KB Created: 2021-02-17 15:42:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 78e7ab9ec5d175cf47c7da3a3fdf6340 SHA-1: 57b612720d2b0028e89bb69f0aec00e79be9287a SHA-256: 4a828c323c21cf725227abb7d4e2fb0a8d7c94b08f9995c8f33afe90bb7cd7fe
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9451

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://jacksth.ru/aws?utm_term=is+sao+season+4+over PDF link annotation
    • https://cdn.sqhk.co/gunonutib/gfje1ih/basketball_champions_league_team_budgets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416153/normal_602b4b84ddcf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424040/normal_5fd6919192381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_601ecba02fabc.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/hjEdjiR/gajixigekedagenepafiruk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387242/normal_5fe42e0859087.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391621/normal_601841cb06e1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427077/normal_5ff8b1db911b1.pdfIn PDF document text
    • https://cdn.sqhk.co/nakokixega/hzvdZgd/dutixirerarefetiro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368788/normal_5ff6d456ee21a.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/h0Pihhi/82446575959.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/ggf6ggd/download_game_fleet_combat_2_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • https://s3.amazonaws.com/polexebuj/cul_es_la_importancia_del_decreto_de_guerra_a_muerte.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/fun_guided_reading_activities_ks1.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/sovodawupakam.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/allu_arjun_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/moment_format_get_timezone.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/32412424017.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/70357389687.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/last_update_for_iphone_5s.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
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8AC 26296 bytes
SHA-256: f1dd78fe64b4b71eaa96aa6aa82d61c0d2a94f9bd29bafc7b26f0ff21539083f
font_01_sfnt_off00021910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21910 4732 bytes
SHA-256: 3adb7084016c967710ac3be1e40a42f6702ffda07191fedd9044b12ab8f514a2
font_02_sfnt_off00022939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22939 2308 bytes
SHA-256: b91191eca3cfd4097af15fbd9ee8186c346748306a5a282913ddde6230d1059a
font_03_sfnt_off00023346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23346 8560 bytes
SHA-256: 3a7d0b0d9bf0d0aae49bb6c0754a63220851b38cbdbf630d192d3f8ccf5530e8
font_04_sfnt_off000243c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x243C7 1920 bytes
SHA-256: 3e0e88a76314a44bb16b6be95b2eb93b3cc530d05212eb1eebb8bfc365317866
font_05_sfnt_off00024cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24CF7 3704 bytes
SHA-256: 548e1f37c97a57d25a818b84c29f35f1b2938a201b303a96bc9241b802575ffe
font_06_sfnt_off00025828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25828 13272 bytes
SHA-256: 0052d7e6578f21bfa6155391dc5ce7f74db74a1c26c859cfe0d53aea29535ac5
font_07_sfnt_off00028287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28287 2380 bytes
SHA-256: 062a0237fc8569ba63768cc17486fdbb2d0bde9de18f894d6b8f86efded6773e