Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f3465383871fe3…

MALICIOUS

PDF

71.7 KB Created: 2021-02-18 09:21:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2bf3f4ae18a59a392cd2f251007114db SHA-1: 324e32ee8bf073873ea3f4cd53888b78162dfd96 SHA-256: c5f3465383871fe3fe754c18077bda246c2f1552d072aa4834d45cb721be90f0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=what+star+child+am+i'. This indicates the document is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wix?keyword=what+star+child+am+i In PDF document text
    • https://cdn.sqhk.co/rilowikapaz/ijgigfk/qr_and_barcode_scanner_android_github.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatapegil/zhhjhii/nojavimutu.pdfIn PDF document text
    • http://jobs-ingenieur.best/chaganti_koteswara_rao_books_freexdu15.pdfIn PDF document text
    • https://cdn.sqhk.co/buvovemif/eiaBWa1/49154946161.pdfIn PDF document text
    • https://cdn.sqhk.co/bezorufuv/eFI3if6/best_jump_rope_for_weight_loss_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/hjlgeoc/88211946065.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/ronatiduzoxij/zuveraxufudedolisuj.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/arya_video_songs_free_mp4_hd.pdfIn PDF document text
    • http://zozoresupiz.epizy.com/dikojuwirovenumalijapag.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/up_movie_theme_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/conflict_minerals_reporting_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/majizopugebusujifimavonum.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/ciena_5150_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/kazagelaburuvuzu.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_off0000dd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD44 5192 bytes
SHA-256: b302f8c7278598c7fed6649521b49680d4111f274bcd1c893c355eaf540e8b31
font_01_sfnt_off0000eecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECC 10448 bytes
SHA-256: 7c275dca7bb367e00386546987003cb9889560fb68e8c77d5f4d0ed8bf084e81

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