Malicious PDF — malware analysis report

Static analysis result for SHA-256 19de99fb389541cd…

MALICIOUS

PDF

73.0 KB Created: 2021-03-22 15:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb2db73ce5eb9d36db47c2c11f992320 SHA-1: a7de48ee4efaca9322fdd33639c84a69f95a34e4 SHA-256: 19de99fb389541cd8f47725accdeffc6e896478444e8f09352e11957231b3ef5
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that points to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest the document is designed to redirect users to malicious content.

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://golowaki.ru/award?keyword=arrange+pages+in+pdf+file
    • http://gimemuwet.mypressonline.com/niresewigonakerigonirene.pdf
    • http://bebetadiruj.mywebcommunity.org/what_is_pilot_arc_on_a_plasma_cutter.pdf
    • http://govuled.mywebcommunity.org/ncert_books_class_4_english.pdf
    • https://rofokaragi.weebly.com/uploads/1/3/2/8/132815015/gigir_jiwuriroreneg_zefomuzoziki_tovabil.pdf
    • https://cdn-cms.f-static.net/uploads/4413978/normal_60212d003a173.pdf
    • https://rilirali.weebly.com/uploads/1/3/4/2/134235358/6891660.pdf
    • https://bogigevaruzo.weebly.com/uploads/1/3/4/4/134435623/giwirafov_tureruzo_ritujesakuf.pdf
    • https://kepuromoru.weebly.com/uploads/1/3/4/9/134902866/pesegipap.pdf
    • https://cdn.sqhk.co/putizimetiwe/Wumhaha/vevuvubi.pdf
    • http://kejoxemubogese.mywebcommunity.org/lokipusegaxi.pdf
    • http://movawizaxaxato.mywebcommunity.org/how_to_cook_rainbow_trout_fillets_uk.pdf
    • https://cdn.sqhk.co/genopeno/0geydig/crazy_bowling_3d.pdf
    • https://fikazimibugexu.weebly.com/uploads/1/3/4/5/134515259/sapuj.pdf
    • http://digosige.mywebcommunity.org/buwelefawavidemafukubob.pdf
    • https://cdn-cms.f-static.net/uploads/4485016/normal_601f9a8864b19.pdf
    • https://cdn.sqhk.co/xawobovuji/YuIjdhh/apk_vip_empire_v3_mobile_legend.pdf
    • https://cdn-cms.f-static.net/uploads/4463034/normal_60312d2c1eee2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rubidokezive/wordpress_tutorial_2020_download.pdf
    • https://s3.amazonaws.com/jadudusujuje/61438897758.pdf
    • https://s3.amazonaws.com/kisagoz/cien_aos_de_soledad_resumen_muy_corto.pdf
    • https://s3.amazonaws.com/rezugekolaba/90866692882.pdf
    • https://s3.amazonaws.com/xefejevife/ninokirowar.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_off0000df80.bin
81b10d927cc47163e0b2edd522ae098e0e3c0b458aa7566a973e208b6743239b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF80 5200 bytes
font_01_sfnt_off0000f140.bin
9bc77d924ad084ccaa96336e525e072a5f81b1654acfca364da0a0ff7a68ed83
pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 11124 bytes