Malicious PDF — malware analysis report

Static analysis result for SHA-256 277159639f420f2a…

MALICIOUS

PDF

79.9 KB Created: 2021-01-19 19:12:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: dbc82e22b49358a33b35ef794e23054a SHA-1: db9d4cc4af7fb93a1e3ab6c487e116b68d1a6ae3 SHA-256: 277159639f420f2aa8f39715da3ea630fad7625156f2686f627c6959b3716bc3
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, identified by heuristics as an external URI and an embedded URL. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV specifically flagging it as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to 'film' and 'site name', aligning with phishing or malware distribution tactics. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site.

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://jottigo.ru/aws?utm_term=hd+film++site+name PDF link annotation
    • https://site-1176298.mozfiles.com/files/1176298/old-_time_gospel_songs_youtube.pdfIn PDF document text
    • https://site-1168244.mozfiles.com/files/1168244/optical_illusion_quiz_ppt.pdfIn PDF document text
    • https://site-1207146.mozfiles.com/files/1207146/campbell_hall_school_uniform.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/hcjfxgf/bmcc_academic_calendar_fall_2019.pdfIn PDF document text
    • http://sanadewa.iblogger.org/xovatuziriraluxejaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469350/normal_5ff29e306888d.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/9jh4T1x/86662828940.pdfIn PDF document text
    • https://site-1168163.mozfiles.com/files/1168163/sago_mini_vacation_download.pdfIn PDF document text
    • https://site-1175642.mozfiles.com/files/1175642/64462090119.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420752/normal_6000efdd9bb5a.pdfIn PDF document text
    • https://site-1242625.mozfiles.com/files/1242625/analyzing_political_cartoons_student_worksheet.pdfIn PDF document text
    • https://site-1166752.mozfiles.com/files/1166752/6423924907.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluniziwav/hc8jjvF/cod_fish_cake_recipe_easy.pdfIn PDF document text
    • https://site-1084247.mozfiles.com/files/1084247/magic_mods_skyrim.pdfIn PDF document text
    • https://cdn.sqhk.co/dupeguwova/iedigsG/hat_tricks_delivery_tampa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/38977394956.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/20296009749.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/telephone_lady_gaga_sheet_music.pdfIn PDF document text
    • http://defizal.epizy.com/litokikesedamisuti.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/4588665209.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/kugiguzitilogofo.pdfIn PDF document text
    • http://sezigan.epizy.com/32750356255.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC75 4920 bytes
SHA-256: fda416f46db48286b2a18c8dd1518d10b406b9b60199531e3380fd8c848e3ccd
font_01_sfnt_off00010d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D21 10968 bytes
SHA-256: b2cc55eccb044e5f1116f0cebdce7d5011c877bbaa1f5ae40bc0f7b22101337c