Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b5ad507c8a9917…

MALICIOUS

PDF

77.1 KB Created: 2021-04-06 00:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cc6498c1d66a7ff3370153e4380f36e SHA-1: d2ca4deb8d1a1fe18f35530065385206f05202d9 SHA-256: e5b5ad507c8a99177464da6271616a1af91b09002682fa6f4fc9a6498ed94603
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://nipisod.ru/123?utm_term=tenancy+agreement+nsw+template', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'tenancy agreement template'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=tenancy+agreement+nsw+template
    • https://cdn-cms.f-static.net/uploads/4422645/normal_601a02338c4b5.pdf
    • https://static.s123-cdn-static.com/uploads/4420432/normal_5ff45a1c9844d.pdf
    • http://kuxufijum.iblogger.org/den_allvarsamma_leken.pdf
    • http://winoraama.fun/dialogue_exercises_worksheet6l3le.pdf
    • http://rte-ita.fun/548546535593v369.pdf
    • http://zunuruxeguxifi.mygamesonline.org/asthma_action_plan_australia.pdf
    • http://moviesaddaa.online/77586388708ynu1d.pdf
    • http://ruvikuvi.mywebcommunity.org/samsung_front_load_washer_drain_pump_replacement.pdf
    • http://straponartist.com/76613599239zuz6w.pdf
    • http://fobutolojad.iblogger.org/pijijob.pdf
    • https://static.s123-cdn-static.com/uploads/4415334/normal_5ff38d65bd196.pdf
    • https://cdn-cms.f-static.net/uploads/4390999/normal_606570a294cdb.pdf
    • http://muslims.net/spiritual_gangster_iphone_wallpaperh1hq5.pdf
    • https://static.s123-cdn-static.com/uploads/4456989/normal_60070685ae9b4.pdf
    • http://guzoseta.getenjoyment.net/xobukapavite.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vakizonozajaxe.onlinewebshop.net/nimumoketozegotabar.pdf
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_dccd00840e35425a85a5be165e27c983.pdf?index=true
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_c1da0f10510348ad8c0861847f603bd1.pdf?index=true
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_c48a5f286a8a47a6aba4d7d078213f08.pdf?index=true
    • http://nitumajalu.epizy.com/makoposogirujodog.pdf
    • http://litorow.myartsonline.com/lusex.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_off0000f03e.bin
cbd0ce97bbdf487e12a1cc360368cd4d1e70f8a00eeb89e6fdd195fb7dbd30ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xF03E 5396 bytes
font_01_sfnt_off0001029f.bin
a84dcfd04cdd77225dfdc3d3d5c5c08068d3bc2402c46bb8ad87a4d48925ad41
pdf-font-stream PDF embedded font (sfnt) at offset 0x1029F 10720 bytes