Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17ae97d52c512d0…

MALICIOUS

PDF

105.2 KB Created: 2021-03-24 16:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67fcb731b192fc58e12bd363518247e5 SHA-1: 7bd9503f1b99e3a7aa151ce5b939996021bbf6ef SHA-256: e17ae97d52c512d0b9e9990edf2f3792861ecca65a66520a40cb860f7cf45c5a
124 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with heuristics indicating it uses invoice and callback lures. The embedded URL, https://zajinet.ru/wix?keyword=global+express+guaranteed+service+guide, likely serves as a lure to download a second-stage payload. The document body, though heavily obfuscated, contains text related to service guides, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=global+express+guaranteed+service+guide
    • https://cdn.sqhk.co/menasimax/ciejgHT/serowejejomasugevu.pdf
    • http://jumbochecker.com/634548104509j752.pdf
    • https://cdn.sqhk.co/jukusenefow/R4ieKig/outbreak_synonym_phrase.pdf
    • https://xoregofejaba.weebly.com/uploads/1/3/4/6/134651656/8655098.pdf
    • http://wejutejejuwow.iblogger.org/sugasovelafalavoruno.pdf
    • http://czecheducation.space/28896259244y2x1b.pdf
    • http://golepikoxeware.22web.org/angular_5_landing_page_template_free.pdf
    • https://raxokada.weebly.com/uploads/1/3/1/4/131409035/purakawenit.pdf
    • https://static.s123-cdn-static.com/uploads/4404738/normal_5ff79499c39bb.pdf
    • https://cdn-cms.f-static.net/uploads/4410730/normal_6046393b138e6.pdf
    • https://cdn.sqhk.co/pabonoruje/7ibTiiZ/granite_laminate_countertop_sheets.pdf
    • https://cdn.sqhk.co/gasariba/siihgcS/cosmology_definition_astronomy.pdf
    • https://cdn-cms.f-static.net/uploads/4465555/normal_60240c9283eb3.pdf
    • http://sport-stavki.fun/gloriana_conversin_de_hilos_a_dmcckvdq.pdf
    • http://carinsusa.com/jezenexupaweidhg0.pdf
    • http://likelid.xyz/zurudo6g6h8.pdf
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/tozexulobabolep.pdf
    • https://cdn-cms.f-static.net/uploads/4387031/normal_601c6aabaec89.pdf
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/rufumomeboru-mazizasigipom.pdf
    • http://insuranceautousa.com/what_is_the_famous_quote_from_star_wars1n1rz.pdf
    • http://marketeuro.pro/aeries_tcusd_complete_online_forms05ev8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dubirapotemudi.rf.gd/excel_budget_worksheet_free.pdf
    • http://vowaxuf.rf.gd/marine_accident_reporting_regulations.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_off000158ce.bin
73a25afed6109bae8ee0ebf4f03a8686e14152ece2f8a4e57b74b2991bd7f17d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158CE 5540 bytes
font_01_sfnt_off00016bb7.bin
ab0aa79b167ed0660a20e7e11708a779d01114987afa3f4704074a8f2f56424a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16BB7 12456 bytes

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