Malicious PDF — malware analysis report

Static analysis result for SHA-256 022285a2d9df4173…

MALICIOUS

PDF

83.5 KB Created: 2021-09-09 02:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 24c2b2b733cd98e58f80a640c281e11b SHA-1: 59aec4f2bbfab3a0e26ad5db1921066593d73c40 SHA-256: 022285a2d9df4173003692efc75dab6cb08a9e8b37d832b625c7e5ed9f2bd82d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is part of a link farm designed to distribute content across many disposable domains. The embedded URLs, though many are unknown, suggest an attempt to direct users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/2c343f3ca164919e1d11f04498e805f2/948660741.pdf In PDF document text
    • https://glamweddingdesign.com/userfiles/file/tokedewuvi.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/vopoluporosuzexaw.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/a9c192d5621a0c43acda1be0cdd1149f.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/pubawakulepitepulosaj.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/duteg.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/54854145664.pdfIn PDF document text
    • http://playoz.com/ckfinder/userfiles/files/10460836176.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/73348822740.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/41486222648.pdfIn PDF document text
    • https://bloc-immo.com/images/63957782872.pdfIn PDF document text
    • https://heyratacademy.ir/file/lawunijejaditavonamojur.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/zevadewixas.pdfIn PDF document text
    • https://lotte-ppta.net/beta/assets/file/79965250952.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/raxapowigupaji.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/mugisafobetenokiso.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134bd3f22e9a---bituxagufom.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/93264962597.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/82102454606.pdfIn PDF document text
    • http://thietbiantoanttk.com/uploads/files/gikukexosix.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/fesamafuwexosirolazo.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16138fa2e8f56e---90139554661.pdfIn PDF document text
    • http://89928386.com/uploads/files/202109040527399999.pdfIn PDF document text
    • http://linza-market.ru/upload/files/36719625615.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=photoshop+android+alternativePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE157 10556 bytes
SHA-256: 04aaa5d7985a55fd2372d2608f8928f5961691a3bcca64589277061e3f4aeee1
font_01_sfnt_off0000f95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95C 17896 bytes
SHA-256: 73ba47ca9e8cf38f317a3143df012d0292b799e8257409eb3473d017292e926a
font_02_sfnt_off00012855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12855 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1