Malicious PDF — malware analysis report

Static analysis result for SHA-256 1275ddd296db75d4…

MALICIOUS

PDF

73.7 KB Created: 2021-05-06 05:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 561c9aa3cfdbf7e60550eba4a935171d SHA-1: 4d33f8ca99e63a6a1f5d4d5a6c2a60306efe251b SHA-256: 1275ddd296db75d46b64f1dc9639050995ef7b6b885ae691b5e8c4441c24b30a
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URIs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=navy+blue+jacket+womens+wedding
    • http://joxuwevu.iblogger.org/fonokipotevifenadapaj.pdf
    • http://mujudesuxiropa.sportsontheweb.net/ipcc_books_icai.pdf
    • https://sijawakupud.weebly.com/uploads/1/3/0/7/130740213/kisarogodu.pdf
    • http://xevamoz.mygamesonline.org/toefl_independent_writing_topics_ets.pdf
    • http://tefitagesev.mypressonline.com/son_of_chicken_qabalah.pdf
    • http://gavokofubafixi.getenjoyment.net/xevesasunurezuwavonafij.pdf
    • http://lorozetuwivu.medianewsonline.com/descargar_guia_autometrica_2020.pdf
    • https://mulodunewumil.weebly.com/uploads/1/3/4/3/134314444/1b268eafada84c9.pdf
    • https://gaxezoxo.weebly.com/uploads/1/3/0/7/130776828/vurevulafanuv.pdf
    • http://tamakedesununod.mywebcommunity.org/gusezamuzelin.pdf
    • http://sitizinudex.getenjoyment.net/axial_scx10_1_24.pdf
    • https://zevuvizaxetu.weebly.com/uploads/1/3/4/8/134887967/36212165c0.pdf
    • http://vamefegali.mywebcommunity.org/pefaput.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zaduzos.myartsonline.com/fe_chemical_review_manual_lindeburg.pdf
    • https://uploads.strikinglycdn.com/files/8b56023c-853a-43f0-ae10-906f7f7ea3ff/soccer_betting_systems_that_work.pdf
    • http://popaxaxi.epizy.com/journal_le_buteur_algerie_aujourd_hui.pdf
    • https://uploads.strikinglycdn.com/files/c51fe5c9-1ec1-4f2b-b267-b7be2262150d/27267104292.pdf
    • http://wejajesenopezoj.onlinewebshop.net/1000_frases_em_ingles.pdf
    • https://uploads.strikinglycdn.com/files/ac087e09-0b01-4539-a88e-3bf2b10041b0/pagugosekalerovaxuje.pdf
    • https://uploads.strikinglycdn.com/files/35662d1b-378e-418b-a161-4f6ad4cfc041/56747425467.pdf
    • http://kunovudulex.rf.gd/35077413451.pdf
    • http://tobikinos.onlinewebshop.net/acute_and_chronic_bronchitis.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
    • 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_off0000cc5c.bin
1405a25dd50ac403fda1184076ba389809eadfeda8721ad89c88a945b9af2a59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5C 5664 bytes
font_01_sfnt_off0000dfc6.bin
4c811cb7014126afda1b8a9c10ef0ac105aa8b3ed98d05197a5309275cc16302		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC6 10052 bytes
font_02_sfnt_off0001025e.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 16164 bytes

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