Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97fc57e9c8ff57e…

MALICIOUS

PDF

74.3 KB Created: 2021-03-27 09:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3216c34f01f2d36e498570bba965c286 SHA-1: 2aff0cf10f484cee865dedc0dc062ee0ac7d725c SHA-256: e97fc57e9c8ff57ef41dc11fe75a206a6913d389e3b51866cd1c03cebb89ecce
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and scam content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a scam operation disguised as financial trading information. No scripts were extracted, but the presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to malicious websites.

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://resalured.ru/strik?utm_term=can+you+day+trade+with+less+than+25000
    • https://giwelexe.weebly.com/uploads/1/3/0/8/130814055/namegiw.pdf
    • https://cdn-cms.f-static.net/uploads/4427079/normal_603cb10018d1a.pdf
    • http://zajawezexefijuk.22web.org/35133982154.pdf
    • https://static.s123-cdn-static.com/uploads/4495860/normal_5feff9f14406b.pdf
    • http://timinome.getenjoyment.net/brother_knitting_machine_spares_uk.pdf
    • https://cdn.sqhk.co/jesovolavig/Jienjhx/10627530125.pdf
    • https://futilupotozuvat.weebly.com/uploads/1/3/1/4/131454482/a78a58f.pdf
    • https://cdn.sqhk.co/ruzaxube/d5mhfjb/hashtags_para_instagram_fortnite.pdf
    • http://lovemecompletely.com/offroad_jeep_driving_simulatorxhep7.pdf
    • http://tukomibewi.getenjoyment.net/cpr_rules.pdf
    • https://retezuve.weebly.com/uploads/1/3/2/7/132741149/37e54bba8e097.pdf
    • https://cdn-cms.f-static.net/uploads/4463005/normal_60112abfd48d6.pdf
    • https://cdn.sqhk.co/fiporalisu/agf2je0/46783163198.pdf
    • https://cdn-cms.f-static.net/uploads/4447487/normal_6010cdf2ea271.pdf
    • http://widonatozeg.mypressonline.com/online_textbook_of_bacteriology.pdf
    • http://portkamesto.site/zokosid23x9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xopiwimiwopuse.epizy.com/komuwirewedegiketex.pdf
    • http://wefexafunedex.epizy.com/integral_derivative_calculator_apk.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_off0000e467.bin
139987616c16a58735817e6dc8b2bd02db4179056ef75fea5130a3ef3a2a13d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE467 5412 bytes
font_01_sfnt_off0000f6da.bin
92ff7efebdc2633a30bde20b134276bb27588eabceba9238c895b490862d4b2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DA 11224 bytes

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