Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33f2c674dc008ea…

MALICIOUS

PDF

69.4 KB Created: 2021-09-26 16:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15f274dee57ee86f487f817c509862c2 SHA-1: 6c63fd3d7d5a12bbe1f9bb8a4def2e83ee3a0c4a SHA-256: a33f2c674dc008ead229712f586a1dbf747d38d40c2d32ac9434aa9f31969a12
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The presence of multiple PDF_URI heuristics and a high ML score indicates a strong likelihood of malicious intent, likely to trick users into downloading unwanted software or visiting malicious sites. No scripts were extracted, but the overall structure and URL distribution suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://irvinenott.co.uk/ckfinder/userfiles/files/gonesex.pdf
    • http://ivankotov.ru/img/lib/file/kisovijexufuwupepevi.pdf
    • http://fatamorgana.fr/uploads/assets/file/porekorekiduxip.pdf
    • https://eliteplacementagency.com/uploads/files/40077038440.pdf
    • http://briztravel.com/upload/files/23982896651.pdf
    • http://bloemenwinkelindex.nl/images/uploads/26697068073.pdf
    • http://bonsite.nl/phpcmsys/file/44888019964.pdf
    • http://archiw.gbpopatowiec.pl/img/upload/files/tisebobiramagufep.pdf
    • https://granitabrasive.hu/editor_up/6233545488.pdf
    • https://classconnbio.com/img-jacson/files/lejijenusoxogowegoxito.pdf
    • http://metisentry.net/ckfinder/userfiles/files/wuxidewibeso.pdf
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/pigejejuke.pdf
    • http://icoenergia.com/userfiles/files/27319218029.pdf
    • https://mimpishiosatu.com/contents/files/34632382033.pdf
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/2a616bc38c55268436ad60f3e63ca6d4/54938700677.pdf
    • https://ratosatu.com/contents/files/rozulijowakapovitekakeja.pdf
    • https://agregadoschucuri.sinecsas.com/ckfinder/userfiles/files/furoka.pdf
    • https://wct.goldcrownresort.com/magazine_files/files/xupevofada.pdf
    • http://hrdiborice.cz/erucom1/files/files/48919831516.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/hctfbb7basfil5enisstic7kat/5848791657.pdf
    • https://rjpexport.com/files/27131439578.pdf
    • http://strategie-online.net/catalogue_dynamique/file/25346421877.pdf
    • http://timocomputer.cz/files/file/gibawezolifob.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=gta+5+game+download+in+android+mobile
    • 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://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_off0000b0e9.bin
84252f624a161fed8fbce118859ba5f1cdafb9c212769a4dba00247d7169e5da
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E9 10820 bytes
font_01_sfnt_off0000c9b5.bin
5bf49d8408864f7c14e65d61bd98f48ae6503e09143557f53535b79bc136395c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B5 15796 bytes
font_02_sfnt_off0000efa3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA3 16792 bytes