Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e22f2bdd1c39322…

MALICIOUS

PDF

80.0 KB Created: 2021-03-23 16:15:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee28a4b66d2cf8c03fffcdf899cee19f SHA-1: 7ed2096fa0063c013b3324394bd2197464c02816 SHA-256: 5e22f2bdd1c393223df5d9a2213e560aa8f55fb075612b829d1c1aa18ca1a056
126 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'nba 2k19 apk download revdl', suggesting a lure to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=nba+2k19+apk+download+revdl
    • https://fuvufuraw.weebly.com/uploads/1/3/4/7/134745886/7793593.pdf
    • http://gekodejevotug.medianewsonline.com/rodisureteteruliwusazoxe.pdf
    • http://rabiwitijif.medianewsonline.com/garmin_gns_430_manual.pdf
    • http://bamupiwabibajew.mywebcommunity.org/quadratic_equation_calculator_factoring.pdf
    • http://smartycredit.info/anti_spy_app_android_kostenlos4n94i.pdf
    • http://itnegozio.info/husqvarna_lawn_tractor_clicking_but_wont_startl9rz3.pdf
    • http://banademebilite.sportsontheweb.net/char-broil_performance_4-burner_gas_grill_parts.pdf
    • https://wevejabunom.weebly.com/uploads/1/3/1/4/131406075/xipebu.pdf
    • http://watercart.ru/fubepetumunigifupgj82.pdf
    • http://daddytestit.xyz/598399031231660p.pdf
    • http://pawusewi.sportsontheweb.net/57603170525.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lukigek.rf.gd/98201362934.pdf
    • http://telusomabufa.onlinewebshop.net/97966437972.pdf
    • http://xogeguf.rf.gd/pixafosotagiv.pdf
    • http://miganuvag.myartsonline.com/neurological_physical_examination.pdf
    • http://nejimafalun.onlinewebshop.net/zexukakosowanosivegi.pdf
    • http://ladopinizaxo.rf.gd/how_to_upgrade_shimano_di2.pdf
    • http://vawirir.atwebpages.com/descargar_diccionario_espaol_ingles_gratis_para_pc.pdf
    • http://matewedidoxeber.onlinewebshop.net/joint_of_n_order_statistics.pdf
    • http://napupitupevis.rf.gd/fusosadadesikugikabaxit.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee5e.bin
a6e97df8ada20f540e8cd178f5470651cb7f8df2c5fc3a4775520b25d9f06b37
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5E 5100 bytes
font_01_sfnt_off0000ffd3.bin
7a40b975bc8a2d3a9dddb6bb734b9c9d8c6d810efd2cc06b92dd730005169cf0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD3 10744 bytes
font_02_sfnt_off000124a8.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x124A8 4324 bytes