Malicious PDF — malware analysis report

Static analysis result for SHA-256 a83b072d93ae9f48…

MALICIOUS

PDF

91.6 KB Created: 2021-03-21 03:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3a75c83fee32e184dde4bf9dc0e984e SHA-1: e1fe6f1c8dd434c8ef8943d5752b2bf83a5f6ed2 SHA-256: a83b072d93ae9f48cf49b9ca2e19338e8e84f7fa581cd64f4a1e772f367e2ebc
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is identified as malicious by multiple heuristics and a machine learning classifier. It contains an embedded URL leading to a domain associated with phishing lures, specifically mentioning 'equifax data breach report pdf'. The 'SE_CALLBACK_LURE' heuristic further suggests a callback phishing or tech-support scam pattern. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate potential exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://mezovuduw.ru/award?keyword=equifax+data+breach+report+pdf
    • https://lukuxafibufogi.weebly.com/uploads/1/3/5/4/135400428/dojabejekole.pdf
    • https://static.s123-cdn-static.com/uploads/4470833/normal_60068d7c29d92.pdf
    • http://milafikolume.iblogger.org/freundlich_adsorption_isotherm_equation.pdf
    • http://vozuzutiwajuzip.getenjoyment.net/behavior_therapy_techniques.pdf
    • https://static.s123-cdn-static.com/uploads/4490370/normal_5fc7a9a0dcdf1.pdf
    • https://pavejomesof.weebly.com/uploads/1/3/4/3/134310872/7907063.pdf
    • http://podeves.xyz/22758170103t8vxu.pdf
    • http://lnstagramverifiedsbadgeform.com/12087157146my0js.pdf
    • http://tufofol.medianewsonline.com/82024372597.pdf
    • http://lumobumekola.getenjoyment.net/should_internet_be_capitalized.pdf
    • http://lipexifinidoda.scienceontheweb.net/how_to_connect_altec_lansing_speaker_ima699.pdf
    • http://kojazunupetip.mygamesonline.org/lozetunajolotatajulibi.pdf
    • http://vavazexowupex.medianewsonline.com/baby_bullet_steamer_measuring_cup.pdf
    • https://xoxajunun.weebly.com/uploads/1/3/4/3/134351876/50ad435b396.pdf
    • https://cdn-cms.f-static.net/uploads/4412591/normal_604fa4cc2581e.pdf
    • http://kuvezowepo.scienceontheweb.net/72265311683.pdf
    • https://cdn-cms.f-static.net/uploads/4372707/normal_6012421b13ccf.pdf
    • http://seplafond.xyz/29720517728o0qkd.pdf
    • http://sizegoduxuxa.mygamesonline.org/67057421997.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zamajud.epizy.com/spectra_s1_plus_breast_pump_bag.pdf
    • http://funuduki.rf.gd/aha_idsa_infective_endocarditis_guidelines.pdf
    • http://belibivizonojo.myartsonline.com/rivosojagijalezodejaduzi.pdf
    • http://fasevebozumip.rf.gd/gmat_official_guide_ebook_free_download.pdf
    • http://guxejusoselota.myartsonline.com/south_america_major_rivers.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_off000125d5.bin
3a8a13dd954cdd65d38d394ffa8de657e54b207c642f8f1d910d7375965dea15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125D5 5324 bytes
font_01_sfnt_off000137f1.bin
7651acc3f25a9a3cda57d08cb82be9d47ef938ed54b2fef1cfc373064b4df9c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137F1 12264 bytes

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