Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d5fd9f17a6c667…

MALICIOUS

PDF

77.5 KB Created: 2021-02-24 07:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69cbd01283621765e9071eabd9f4d89e SHA-1: da93bd19839d15a411fa78b92d56f4d950cce43b SHA-256: 92d5fd9f17a6c667a2fc12a8402e091601ed5437c8f0fc3ecb4b43cc6d11e8b5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF document exhibits characteristics of a phishing or malware distribution lure. The presence of a large number of external links, many with SEO-like slugs, suggests a link farm intended to drive traffic or distribute further malicious content. Crucially, the 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to interact with the clipboard in a way that could lead to command execution, likely to download and run a second-stage payload. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://druttle.ru/wix?keyword=minecraft+mods+1.5+2+modloader
    • https://cdn.sqhk.co/zeliravepuj/gdhiigE/oblique_pentagonal_prism_volume.pdf
    • https://cdn.sqhk.co/nazujovo/irX3Qii/sonic_the_hedgehog_movie_2020_pictures.pdf
    • https://cdn.sqhk.co/mitejapeki/rjavdH5/descargar_stickman_fight_legend_of_survival.pdf
    • https://cdn.sqhk.co/vapezuwe/a1hgwoc/back_wars_hack_version_download.pdf
    • https://sowobufujugazid.weebly.com/uploads/1/3/0/8/130873997/jusomij.pdf
    • https://lowaribopuvege.weebly.com/uploads/1/3/2/8/132814272/pepaxix-bowonijavobamot-beretudadorixur-kativizowaf.pdf
    • https://cdn.sqhk.co/jawubibegeba/SuQhigh/descargar_freeroam_city_online_para_pc.pdf
    • https://berebexamoleti.weebly.com/uploads/1/3/1/3/131384136/6859039.pdf
    • https://cdn.sqhk.co/tavanaru/jekNihi/pagevabufumenutakomuta.pdf
    • https://cdn.sqhk.co/risenulowo/EqjggzF/45119812253.pdf
    • https://cdn.sqhk.co/pugudanirav/owg5Ohf/53091337905.pdf
    • https://cdn.sqhk.co/dimusokobab/eijEibi/capital_funeral_home_obituaries.pdf
    • https://cdn.sqhk.co/xidafigutoxa/EgeBDzk/download_apk_sakura_school_simulator_update.pdf
    • https://cdn.sqhk.co/teforoke/Ojshgx2/bad_piggies_field_of_dreams_hack_download.pdf
    • https://cdn.sqhk.co/zakolemafemo/jebjRkx/19043867247.pdf
    • https://cdn.sqhk.co/verexoleki/gfihiaD/onenote_onedrive_sign_in_not_working.pdf
    • http://tegogigagozij.iblogger.org/xexugojijiwinakojufuw.pdf
    • http://xusonawifofi.iblogger.org/bamboo_cot_sheets_australia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcc1.bin
07d14af6a1195d65c9d2ee20ef227dbffe1a7f4a02a3e0352ef1814fd6e2398e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC1 5512 bytes
font_01_sfnt_off0000ef88.bin
25b1af267a580cb559d6ab94ae77fcbf7967c591fdc5fdcb304bc514814843c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF88 10564 bytes
font_02_sfnt_off000113e4.bin
b2cf57f29eb3b5e0c174876c58b70ef8fadd81916e6e05a17acc225f9629e7e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113E4 16064 bytes

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