Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64e2364240bbbe9…

MALICIOUS

PDF

79.8 KB Created: 2021-03-24 06:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59798fddd74775275032e301cb039db3 SHA-1: d097a0420a5eae258bcb9cb1c0ae71b97f964517 SHA-256: a64e2364240bbbe9bebfebe5f4e87b17bb1652972db9f5d943daeccb65844208
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to 'vilenefex.ru' suggests an attempt to redirect the user to a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://vilenefex.ru/aws?utm_term=for+goodwill+meaning
    • https://cdn.sqhk.co/fajoliteve/geghnih/happier_ed_sheeran_cover_female.pdf
    • https://fofagova.weebly.com/uploads/1/3/4/3/134313529/e3252dd3846d954.pdf
    • https://cdn.sqhk.co/vopupevomate/hishijg/dark_forest_map_warriors.pdf
    • https://cdn.sqhk.co/dafisuwikib/amjgVmp/butunifebuvixikamigipe.pdf
    • https://cdn.sqhk.co/jekuvobu/beo7eji/mesifetimewatififatije.pdf
    • https://cdn.sqhk.co/dulemokel/2jdpUha/90087971521.pdf
    • http://hot-money.fun/badger_5_1_2_hp_garbage_disposal_installation_instructionsx47k4.pdf
    • http://iblack.space/948633588959e9g4.pdf
    • https://salobomuxalevi.weebly.com/uploads/1/3/1/0/131070078/bf8ac.pdf
    • https://finirawex.weebly.com/uploads/1/3/2/7/132741073/danixofabenibi_bukalan_gipozexidafiba.pdf
    • http://nuvagefo.medianewsonline.com/3d_printing_concrete.pdf
    • http://mandarin-fruit.space/aurora_hdr_2018_crackgvdc5.pdf
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/7162868.pdf
    • http://ulekschool.online/mojipimenixulul5acgx.pdf
    • http://forexgeeks.net/74111653844ntd6b.pdf
    • http://vomoliba.scienceontheweb.net/vefatelekir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dabemekos.epizy.com/agatha_christie_ten_little_negro.pdf
    • http://bibezakomi.myartsonline.com/what_is_color_hue_and_saturation.pdf
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_c12e515d06b8450e9d16483255c47a58.pdf?index=true
    • https://0c2a7d7b-be9d-4ef2-a94c-09ca905cc17d.filesusr.com/ugd/7d21c0_49cb6f7a6d144193a56e673958f48221.pdf?index=true
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_51d92e661e0745b292cb0c08f8c3684b.pdf?index=true
    • http://selaxarizipa.rf.gd/sotej.pdf
    • http://kegogoxuxupi.rf.gd/pemumivadaxojitodibi.pdf
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_a481a845120a451f824d8b55f7de8446.pdf?index=true
    • http://fokibofu.epizy.com/concierto_de_aranjuez_guitar_part.pdf
    • http://tidewoxawutose.epizy.com/63563248906.pdf
    • http://samesesodore.onlinewebshop.net/1000_creative_writing_prompts.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_off0000fb04.bin
8958e981556a2327afda92dc43ffda3a344d626fb8466eea2f48950ab10a3b7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB04 5012 bytes
font_01_sfnt_off00010c0f.bin
0b9c5438f41efef4cc8c4d9ba8b4011d62fa743671edf808032399071700a4b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0F 11016 bytes

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