Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8b1886f3775a0e…

MALICIOUS

PDF

89.4 KB Created: 2021-03-13 13:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18d32aae9ef36397040a32632785eceb SHA-1: 84b3575518480c34fc205c27ed620b1ddf93e498 SHA-256: cc8b1886f3775a0ef8c4642698bd022c22096c428e5e094b1aa4f45e95ebc7ca
96 Risk Score

Malware Insights

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

The file is a PDF with a high ML classification and ClamAV detection, indicating malicious intent. It contains an embedded URI pointing to 'vilenefex.ru', which is likely a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of external URIs suggests the primary attack pattern is to redirect the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://vilenefex.ru/strik?utm_term=the+little+prince+quote+about+rose
    • http://sekelenogake.getenjoyment.net/shamus_khan_privilege_summary.pdf
    • https://cdn.sqhk.co/sezepemanu/hgdNic9/zifokavotaw.pdf
    • https://cdn.sqhk.co/miviterul/gPiijgw/rocketball_championship_cup_hile_apk.pdf
    • https://cdn.sqhk.co/tirinakiweda/igihgWt/umc_el_paso_eastside_clinic.pdf
    • https://pasadaxadug.weebly.com/uploads/1/3/5/3/135390708/38b08bfca8ac.pdf
    • https://kodiridit.weebly.com/uploads/1/3/5/3/135342100/wejuzirikelu.pdf
    • https://cdn.sqhk.co/risevejuxik/RXGEXoJ/30464012796.pdf
    • https://cdn.sqhk.co/befozaxulot/fhiB2EV/sdgr_bass_review.pdf
    • http://saxobupazes.sportsontheweb.net/a_river_runs_through_it_title_meaning.pdf
    • http://maxobujixeweden.sportsontheweb.net/bach_cello_suite_1_guitar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_244ec954fd224be7a0f3f6e7c959153f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0c50cd34-4584-4eca-969a-0ffbd703b251/options_trading_books_reddit.pdf
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_e5153afdb47341aea3793a8e1287df9f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dfc86950-6949-480e-b4ef-403655354f6f/12940083944.pdf
    • https://s3.amazonaws.com/jonora/how_much_do_companies_spend_on_safety.pdf
    • https://s3.amazonaws.com/mamukawaxatali/todas_as_formas_do_chastiefol.pdf
    • https://uploads.strikinglycdn.com/files/84929cf7-833e-4964-8be8-f10ef7d6b4ab/accounting_journal_entries_free_download.pdf
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_68ac349df170467185420c6416b85c39.pdf?index=true
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_e2817e845052411ea6be6897d226939f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7c097fca-f053-4c53-a742-98c262dc5b17/vunaweviv.pdf
    • https://s3.amazonaws.com/sagotomagin/mizotarogitutikixodu.pdf
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_3a845752f5044bb88dc2beec33947336.pdf?index=true
    • https://s3.amazonaws.com/xupizewuxere/how_to_put_frontier_arris_modem_in_bridge_mode.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb8c.bin
cf9dab6fcc127da57d4a1a59f848dc0efff6ed971f78932f33d90811148c0355		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8C 5120 bytes
font_01_sfnt_off00010cdd.bin
2e49c5e7d72024f7db1030a96787b7c0827f831ff7da5b05c1f67d351386a90c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDD 11280 bytes
font_02_sfnt_off0001331f.bin
5d72d630640305d452d914085fd6c65e0d8125198bed8028c282d44fd0327be8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1331F 16068 bytes
font_03_sfnt_off000147c4.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147C4 4324 bytes

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