Malicious PDF — malware analysis report

Static analysis result for SHA-256 21a247117c49bb3e…

MALICIOUS

PDF

73.5 KB Created: 2021-02-03 05:45:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5fce46a2874015fec782763020be913a SHA-1: 708c653fd08c22eeb913b4f5f9ab16d9746ce0c2 SHA-256: 21a247117c49bb3ee9b66fbeb11e93f73cf0b257f3c97888614040bc98a53c67
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to a sewing machine manual, directing users to a suspicious URL. ML and ClamAV heuristics strongly indicate malicious intent, classifying it as a phishing or trojan PDF. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=handy+stitch+handheld+sewing+machine+manual PDF link annotation
    • https://cdn.sqhk.co/mowanideju/ajbhsBh/49413642856.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/gtiaVgj/vivi_bubble_tea_cafe_quincy_quincy_ma.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/zghhihi/fill_hole_in_hardwood_floor.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/iawJ7ge/wolf_3d_wallpaper_for_mobile.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/bojafazes/avengers_3d_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/siwebezabobubifesupuxek.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/divided_by_4_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/womadijobave.pdfIn PDF document text
    • http://xujalupa.epizy.com/mikonagar.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/buxeriwuwuzif.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/kesesokiselo.pdfIn PDF document text
    • http://dexegudev.epizy.com/android_google_backup_frequency.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/wolaloxepafoboxovojewil.pdfIn PDF document text
    • http://zaximibirada.epizy.com/john_wick_chapter_3_imdb_parents_guide.pdfIn PDF document text
    • http://borovob.epizy.com/cardfight_vanguard_planet_wars_apk_english.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/31405398140.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_off0000e126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE126 5412 bytes
SHA-256: f99c6ea8b01bc4a22dfcbfbfc4655b6bf8e3778e86a0f62712a96cc0bc6d594f
font_01_sfnt_off0000f386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 10840 bytes
SHA-256: aac2f4291f74fb7a208cacc6e7a8d98d0ab8bed2e0dc8f1d39bd2cad378a1eca

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