Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf5e95359f0999e…

MALICIOUS

PDF

78.5 KB Created: 2021-05-10 00:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2d498bdeae8a7dad2ebd3a501a1f1381 SHA-1: 2f769c5d62f6d973616f873108e4f4f355e60f52 SHA-256: cdf5e95359f0999e9ee6573c358afbb020c3fb156a7b8d6bf2dbc0caf05b1979
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting it's part of a link farm designed to redirect users to potentially harmful sites. The document body, though partially corrupted, contains text related to voting, likely a lure to encourage users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/strik?utm_term=what+are+the+differences+between+straight+ticket+and+split+ticket+voting PDF link annotation
    • http://zasoremejoka.iblogger.org/diwebupofuvutemunesemefu.pdfIn PDF document text
    • http://dkblogin-de.best/wafokogogevulaxekerorumk79a.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/hb5giig/cute_kawaii_food_backgrounds.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/GEjggc3/lebaran_idul_fitri_2020_bulan_berapa.pdfIn PDF document text
    • https://cdn.sqhk.co/pikevasoze/YjiJibg/12233174996.pdfIn PDF document text
    • https://cdn.sqhk.co/vomikigiw/3SWrjlR/real_color_mixer_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/liwijodi/e2jcA8g/lds_hymns_sheet_music_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/dabebasavus/gixibgh/stickman_downhill_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/tupipitijil/6igR22c/88063087203.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/bluebook_citation_generator_cases.pdfIn PDF document text
    • http://omynutural.space/80755242413qd413.pdfIn PDF document text
    • http://wimudevereru.sportsontheweb.net/todovumorovavogarutaxixev.pdfIn PDF document text
    • https://cdn.sqhk.co/womilepeba/ijhIjih/vic_stay_alert_stay_alive.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/ihhohjn/toon_strike_force_airplane_shooting_games_unblocked.pdfIn PDF document text
    • http://xagevogewa.medianewsonline.com/skripsi_ahwal_syakhsiyah.pdfIn PDF document text
    • http://parkji5x.xyz/milavuxuxesetigofefojodtx918.pdfIn PDF document text
    • http://baugroup.info/design_of_machine_elements_by_faires_solution_manualmfidz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dufapojemuju.epizy.com/carlos_castaneda_don_juan.pdfIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_ef7029e376a3451ebb700d18fe4f3f7f.pdf?index=trueIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_5cc302f49eda4706b82259dbe3a54188.pdf?index=trueIn PDF document text
    • http://kaloruligot.onlinewebshop.net/84782578079.pdfIn PDF document text
    • http://xafinoligu.epizy.com/anthony_giddens_philip_w._sutton_sociology.pdfIn PDF document text
    • http://topatux.rf.gd/latutinozuruwazobewalib.pdfIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/bopoludete.pdfIn PDF document text
    • https://d6bf9bfb-c092-4b17-ab9f-91da83e6a9d2.filesusr.com/ugd/d7ad14_7397e5e216434de793e4de47fe5a279a.pdf?index=trueIn PDF document text
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_966f11152d5846e796f79490b2140df6.pdf?index=trueIn PDF document text
    • http://gerufufa.epizy.com/39436637507.pdfIn PDF document text
    • https://3c59ccad-08dd-474b-8af0-a42d91f20399.filesusr.com/ugd/489ff0_d84e31a330f84ec1a634399859881300.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF318 5788 bytes
SHA-256: 9c6c97c767b5d4b4584380630fd130d0b91a82e550713bf4dec93c4cd8c13a7d
font_01_sfnt_off000106e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E6 10620 bytes
SHA-256: 4f5e8a46264c3cbeac478ee928d6b433bca86f63d40b6f6eb14db8efe8d4cad5