Malicious PDF — malware analysis report

Static analysis result for SHA-256 8142afd9598a4c1a…

MALICIOUS

PDF

87.9 KB Created: 2021-02-12 23:07:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ecd254eb2e61d6b452b505536fb502a3 SHA-1: 98a86609ef5458f413708eedceeedac8b9818a58 SHA-256: 8142afd9598a4c1a05db572b150daad5619970b72def83574ac8e7f32e32feb8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains and are likely part of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document is designed to redirect users to malicious sites, potentially for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://maypoin.ru/123?utm_term=cell+organelles+and+structures+crossword+answer+key PDF link annotation
    • https://jagewimaw.weebly.com/uploads/1/3/4/0/134012974/9b1719852e04bdb.pdfIn PDF document text
    • https://durunefa.weebly.com/uploads/1/3/4/7/134712847/rakuzapemuvofe.pdfIn PDF document text
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/0a333.pdfIn PDF document text
    • http://virona.org/pokemon_amarillo_rom_espaC3B1ol_descargarxzgm2.pdfIn PDF document text
    • http://itdiscount.info/dr_berg_insulin_index_charty1v0v.pdfIn PDF document text
    • http://tryadasert.online/4th_grade_subtraction_borrowing_worksheetsvz10v.pdfIn PDF document text
    • https://bowonalixatan.weebly.com/uploads/1/3/5/3/135347428/ad1a083.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/the_little_mermaid_ariels_beginning_watch_onlined63oq.pdfIn PDF document text
    • http://leftoutclub.com/kawazurezikolnblwn.pdfIn PDF document text
    • http://triple-doska5.club/520211414340a29p.pdfIn PDF document text
    • http://mavito.online/persian_imperial_calendar_convertere2oz0.pdfIn PDF document text
    • https://mezufimuvuleto.weebly.com/uploads/1/3/4/0/134016906/limilegir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/18498185832.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/rubik_s_cube_guide_app.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/vamaluzoreneni.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/xibinuxawilesunamuwodafot.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/breaking_the_law_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/repubewitebabanuw.pdfIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35E 6744 bytes
SHA-256: ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425
font_01_sfnt_off00010446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10446 5268 bytes
SHA-256: 2cbdc08d838b3afbe33390918c9d389fc72df2ed0be6466f75d2ed9003daf344
font_02_sfnt_off00011653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11653 10792 bytes
SHA-256: 1396b9237c4b8ba6f3340709eb97bb45d5d92370a794709b1d58089984597d99
font_03_sfnt_off00013b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B44 16392 bytes
SHA-256: 7e0bba63eabf6c8d3880f8d8e16001b2e466e0d16db77d7190159b1d21e33ad4

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