Malicious PDF — malware analysis report

Static analysis result for SHA-256 00668d50fda1e31a…

MALICIOUS

PDF

76.1 KB Created: 2021-05-08 06:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e21ad89b8e4bf3ccbd1053ed10075b9a SHA-1: 3aceed6769eac2baa1a8a3b805f46e3dbdae7c81 SHA-256: 00668d50fda1e31a382163b00faa3b40fdb6a3da19099cc7529872827a080dda
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF contains a mass external link farm, with many URLs pointing to other PDFs, suggesting a phishing or scam campaign. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document instructs the user to install a remote support tool, a common tactic for gaining unauthorized access. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/strik?utm_term=what+does+20w50+engine+oil+mean
    • https://nuropasidax.weebly.com/uploads/1/3/5/3/135393275/c46729fe7e0.pdf
    • http://chistohome.moscow/905454668lmd89.pdf
    • https://cdn.sqhk.co/dexujagafir/dn54Kja/infected_toe_cuticle_treatment.pdf
    • https://cdn.sqhk.co/sugutomipu/aAiaKsT/mastermind_host_age.pdf
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/eb213ac7c6cf2.pdf
    • https://cdn.sqhk.co/dugelabomaw/daCgg7n/53251368483.pdf
    • https://risenezapaf.weebly.com/uploads/1/3/4/4/134481661/3953fa.pdf
    • http://hookup682.site/how_to_sell_bitcoin_on_cash_app_2020586l8.pdf
    • https://cdn.sqhk.co/lekibefefu/iahirMf/i_am_waiting_for_death_quotes.pdf
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/vafonoworefu.pdf
    • http://luminar2-download.xyz/what_are_the_three_most_important_effects_of_climate_changes5cpu.pdf
    • https://cdn.sqhk.co/kivipemo/gciihgY/luzelak.pdf
    • https://cdn.sqhk.co/voguzasijur/eMtwqTf/53728938377.pdf
    • https://wexapifunoru.weebly.com/uploads/1/3/4/7/134715363/8d3bb.pdf
    • https://cdn.sqhk.co/jawosuzexe/iidikgj/used_carnival_cruise_ships_for_sale.pdf
    • https://visuriteja.weebly.com/uploads/1/3/5/3/135323353/nadapesen.pdf
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/9912021.pdf
    • https://cdn.sqhk.co/fitigeru/CgcHTPc/missile_silo_war_commander.pdf
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/7184376.pdf
    • https://cdn.sqhk.co/jekefebiba/Pu0feig/wukemowatuzepijode.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b8436764-02b3-4471-8711-1e8fed235cf0.filesusr.com/ugd/3b3fbb_80cd5e21767749ddb2a3f1b1385d2906.pdf?index=true
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_f50984ba938e4622a3a187761d95f6f0.pdf?index=true
    • 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_off0000ecc7.bin
7d20609b570a0c3b24a149f25d4d6f37290f7f03ce2115b732726437b392dcf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 5644 bytes
font_01_sfnt_off0000fffd.bin
e93d43aa538ac438c2db7c9643cc69ac3e4d29c5db7bfb772a6ddd28ecf780be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFD 10300 bytes

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