Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f5a739e32c59cb…

MALICIOUS

PDF

115.5 KB Created: 2021-03-22 04:36:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eac34312c05f2b18648ff0abbd181d1c SHA-1: 299dc7691c13a6b96e02b7e95852187ec554105e SHA-256: e5f5a739e32c59cb941a3ab7d109b8bd90d34e27084204345f43ababe80940bd
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or malware distribution campaign. The embedded URLs suggest the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/award?keyword=an+orange+clockwork+pdf
    • http://ighelpcenter.xyz/fekutuwipokarejenorapysssn.pdf
    • http://werikipirojenob.scienceontheweb.net/dikobetusibovefu.pdf
    • http://kijofizovurisos.medianewsonline.com/64084892314.pdf
    • http://wei-nmvc.com/tavunognrfd.pdf
    • http://lyudi23.ru/zujepepukavoxogomelairnim.pdf
    • http://pipvip.ru/best_netflix_movies_to_2017ceb9a.pdf
    • https://gevexivojuler.weebly.com/uploads/1/3/4/4/134444242/labivodilugiji_depipaj.pdf
    • http://jojazinex.mygamesonline.org/1900737376.pdf
    • http://instapriz24.online/pelutogilufozgqrvf.pdf
    • https://numanufideju.weebly.com/uploads/1/3/4/6/134615348/7f565d9d3b56531.pdf
    • http://hocostyle.ru/how_to_connect_ml-l3_to_nikon_d56005f9wi.pdf
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/21ecd.pdf
    • http://jilet2.club/82225828102zoyk9.pdf
    • http://tezibif.mygamesonline.org/ludiguputobutawu.pdf
    • https://gubelowilesatu.weebly.com/uploads/1/3/0/7/130739845/zobujofo.pdf
    • https://veminimuvaw.weebly.com/uploads/1/3/4/6/134630651/mivoreket.pdf
    • http://pawezujexas.mywebcommunity.org/simpson_pressure_washer_leaking_gas.pdf
    • http://x-bionic.shop/wujenefokqgb3c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_88b93f11e49d47c1b27723cdf41f6d62.pdf?index=true
    • https://d848e4b6-662b-4424-a759-963270729452.filesusr.com/ugd/30e015_c0d849305b2246bbbfcbcd209b137dc1.pdf?index=true
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_e093f523286f48599984e687bc586660.pdf?index=true
    • http://lugenizuridaj.atwebpages.com/25191555836.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_off0001857e.bin
cc56838866a7273fe2422491d050a60e7ec6891a384674856ecfbb1be53be548		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1857E 5292 bytes
font_01_sfnt_off000197a4.bin
cda969571c22279c008e3cbc187026a20f0efc903954516a7cab6fe76a426d13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x197A4 12732 bytes

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