Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d0873f4e55a8635…

MALICIOUS

PDF

76.0 KB Created: 2021-04-01 07:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0cc07c3cfa3deb3d9d1d5a3d76dfcc7 SHA-1: 788ca36a01a2069efa59b6b7ac9ae4bbf3d735e8 SHA-256: 4d0873f4e55a8635e4ff287ab5c33c39bf1983a68e6d9648707896c175084882
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that mimics a search result for a book, suggesting a lure to download further content. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the PDF suggest it's designed for malware distribution or phishing.

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://nipisod.ru/wix?keyword=calculus+early+transcendentals+11th+edition+pdf+download
    • http://mejikisevupepen.iblogger.org/above_all_powers_lyrics.pdf
    • https://cdn.sqhk.co/baxotonad/iJ1nrgg/cube_crush_paypal.pdf
    • http://justamorem.com/temesonekor29f2.pdf
    • https://cdn.sqhk.co/wozejodes/aKieOja/legend_vs_zombies.pdf
    • http://sidodawoleze.iblogger.org/71628379075.pdf
    • http://youla-24.cc/gununuxuvobunx2kha.pdf
    • http://presalon.xyz/kotewupunedekabedi8tkxd.pdf
    • https://cdn.sqhk.co/fofesali/00gjhf1/36088813903.pdf
    • https://cdn.sqhk.co/rodofusavivi/fNo2if7/11358395625.pdf
    • http://idealslim-italiaoficial.site/free_printable_goal_sheetsikzt8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/padosumifubobo/44126761114.pdf
    • https://s3.amazonaws.com/lotibabakuj/rosary_prayer_guide_for_thursday.pdf
    • https://s3.amazonaws.com/jakujakula/52863149465.pdf
    • https://s3.amazonaws.com/baxekojojexusol/huck_finn_audiobook_chapter_7.pdf
    • http://gazinopalevigem.rf.gd/aflac_claim_form_accident_wellness.pdf
    • http://xukuwagozoli.epizy.com/87129466923.pdf
    • https://s3.amazonaws.com/xupimaral/gizidosurekirokepixavu.pdf
    • http://vesafasim.epizy.com/how_do_i_update_my_vizio_e601i_a3e.pdf
    • http://kokomato.epizy.com/leatherworking_guide_wotlk_1-_450.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd04.bin
649c7a2996769dc45bcb912809bfbf8d5820020ac9e9bc88b5fda682d59edd8c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD04 5392 bytes
font_01_sfnt_off0000ef6d.bin
2b8333c14a3152b1ce545d8b93df24a488ac2aad43a2399f36f7452145c7718f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6D 11200 bytes
font_02_sfnt_off0001147c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1147C 4324 bytes