Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45bb2d6fc366a17…

MALICIOUS

PDF

68.9 KB Created: 2021-03-19 04:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35391e45f0ba7c871c0323f091ccfeb9 SHA-1: b593d930d6efec85748fcfb7077d06f8772b8f87 SHA-256: e45bb2d6fc366a17b01aeb8964355fad4985507bc9e7e57fee2b242ae73ed31f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous external URLs, with one prominent URL being https://nipisod.ru/strik?utm_term=dyson+ball+animal+vacuum, suggesting a lure related to a product. The PDF structure and embedded content indicate it's designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nipisod.ru/strik?utm_term=dyson+ball+animal+vacuum
    • https://static.s123-cdn-static.com/uploads/4391001/normal_600692de585bf.pdf
    • http://vittorguxx.site/99572908773fwx6k.pdf
    • http://bathforlegs.xyz/butuwiax7wa.pdf
    • https://cdn-cms.f-static.net/uploads/4505326/normal_601628bf628c7.pdf
    • http://dihtyar.online/502277737813muje.pdf
    • http://idealslim-italiaofficial.site/sukokajokadawatomojugiydwvk.pdf
    • https://cdn.sqhk.co/zetuzire/hf8jchi/imfinzi_durvalumab_package_insert.pdf
    • https://cdn-cms.f-static.net/uploads/4464877/normal_5fe8856c8cfaf.pdf
    • http://helplnstagramoffice.com/terraria_cracked_servers_1.3.5.3hhsk7.pdf
    • http://prostosite.site/how_to_change_daylight_savings_g_shock7epbz.pdf
    • http://esagafow.fun/database_management_system_mcqs_multiple_choice_questions_and_answerss4khw.pdf
    • http://uspehdnyaaxyz.xyz/60032517645a78ln.pdf
    • http://xeeewq.xyz/reducing_fractions_worksheet_grade_6seivn.pdf
    • https://cdn.sqhk.co/pibilebomek/bicjhji/zuwiboxotujamisoziw.pdf
    • https://cdn.sqhk.co/xonipavu/ojcsghG/golden_boot_race_19_20.pdf
    • http://mopotiboxa.iblogger.org/difaxejer.pdf
    • https://cdn.sqhk.co/kuwusemob/kijchgo/visolonos.pdf
    • https://cdn.sqhk.co/puwipaneke/gcohjgc/punjabi_whatsapp_status_video.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sumesawoxajew/xagaj.pdf
    • http://tapizekixup.rf.gd/87221920968.pdf
    • https://s3.amazonaws.com/forupokisip/4617666028.pdf
    • http://samanoniminowut.epizy.com/congenital_cmv_infection_case_report.pdf
    • https://s3.amazonaws.com/mudurixo/83369864726.pdf
    • http://tadufaz.rf.gd/rafazilakogojit.pdf
    • http://gelutusuxipedib.rf.gd/29037612067.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0e3.bin
cac781faa5e2fba2950cd6cfd37cb7793834e48c637e7721c63101c4624c5764		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E3 5152 bytes
font_01_sfnt_off0000e26f.bin
841fa9f04aa8a9abe4555e6bc7a0403cb938d93e8c6b3fbbad7099e4768354a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE26F 10124 bytes

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