Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bb95367626d962…

MALICIOUS

PDF

77.9 KB Created: 2021-04-12 01:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d087ef3eca55e4f5dd5dc675a54998a3 SHA-1: bd8a66a5686026b9244a9325d77ac5f660ad3b19 SHA-256: e6bb95367626d9622ef7c0b8d465a858fc5f390a6dd3d56e0da3e4fa5f6415a6
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common phishing lure, likely using embedded JavaScript to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=burger+king+coupon+codes+july+2020
    • http://folutelegaraz.iblogger.org/miwemowurikiburewefutubo.pdf
    • http://uniques.space/inside_out_2015_trailer8hbst.pdf
    • http://paxawujaxoda.22web.org/us_passport_renewal_minor_application_form.pdf
    • http://zofunubesosena.mypressonline.com/jimifinibi.pdf
    • https://cdn-cms.f-static.net/uploads/4381544/normal_601d08c646c42.pdf
    • https://tajamexuzoxobug.weebly.com/uploads/1/3/1/4/131410736/panipiwik-zenarozojifo-nerikawogo-wumofunofezodot.pdf
    • http://livopazumifena.iblogger.org/40878473914.pdf
    • https://static.s123-cdn-static.com/uploads/4406466/normal_5fe4e163211ca.pdf
    • http://reassurez-moi-fr.info/70718027899jnbw8.pdf
    • https://cdn-cms.f-static.net/uploads/4366045/normal_605a1c003a9b1.pdf
    • https://tubolapibakosi.weebly.com/uploads/1/3/4/8/134872187/tikivagafidunexif.pdf
    • http://thelait.pro/xeraxi9six1.pdf
    • http://damita.fun/ejercicios_de_notacin_cientfica_suma_y_restaxvxds.pdf
    • http://salonhq.xyz/influence_the_psychology_of_persuasion_robert_b_cialdini_free_downloadckaxd.pdf
    • https://cdn-cms.f-static.net/uploads/4465263/normal_60287174f0c49.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://salilizuvozel.rf.gd/dowirapefugedusele.pdf
    • http://gototura.myartsonline.com/access_control_in_java.pdf
    • http://lagixilutami.rf.gd/22270179701.pdf
    • http://minepoziwa.epizy.com/cours_automatisme_et_informatique_industrielle.pdf
    • http://solerola.epizy.com/38562475056.pdf
    • http://kelegelevun.epizy.com/2817319162.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_off0000f06f.bin
156179c6aae4cfc5f4f1f2c084d6b64a7648fe258009a39350ed58f4f7c6cc0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF06F 5596 bytes
font_01_sfnt_off000103a5.bin
c1e65d2ea95327185bfb2686e9e4963d6f494dd87c5400cd4464346b38f07e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103A5 11040 bytes

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