Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92b28433bf99927…

MALICIOUS

PDF

80.4 KB Created: 2021-05-16 09:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a9bdd857b2f3951b3967c412c9f18b8 SHA-1: 2a194f79b405c7fcfb772dd529e49790672e7681 SHA-256: b92b28433bf99927269799610d58aa7a19fc9ec49e3df14368c61355fb81b117
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be part of a lure, disguised as information about resetting a generator maintenance schedule. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://zajinet.ru/strik?utm_term=how+to+reset+the+maintenance+schedule+on+a+generac+generator
    • http://clebohets.xyz/126816314794nbvf.pdf
    • http://fullcreditreport.info/screening_colonoscopy_coding_guidelines_20184nfxp.pdf
    • http://bumaga.bz/29718873170lrzks.pdf
    • http://dkblogin-de.com/zuxijeba3ct23.pdf
    • http://foselosen.sportsontheweb.net/98574353740.pdf
    • http://ribugiwegi.22web.org/what_does_the_word_boast_mean_in_a_sentence.pdf
    • http://tevutubiwij.getenjoyment.net/cards_against_humanity_cards.pdf
    • https://cdn-cms.f-static.net/uploads/4409602/normal_6046366bc46eb.pdf
    • http://alcexpress3.xyz/macbook_cannot_format_sd_carde2qs7.pdf
    • https://cdn-cms.f-static.net/uploads/4444864/normal_603e905aec4c3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fuginejazupede.rf.gd/learning_disability_journal.pdf
    • http://davofunup.onlinewebshop.net/adverbs_of_frequency_activities.pdf
    • https://b3a8b944-ddec-4d17-9b53-5a1c05c66d8c.filesusr.com/ugd/314503_fe36d74c5f714777849ce964a4b3031f.pdf?index=true
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_245d18431e1e400d8d3e6746973bfc9e.pdf?index=true
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_05504a341de14d99a0368cf5e42104a3.pdf?index=true
    • http://bilazuwabipuz.epizy.com/99695146906.pdf
    • http://bogutofiwib.rf.gd/57927657720.pdf
    • http://gakilasefit.myartsonline.com/tm-ac1900_default_login.pdf
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_e2af03dff30745e68111a3a7ca6b1d9e.pdf?index=true
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_f1dac03f4a434994aaca3e38d58d0cd3.pdf?index=true
    • 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_off0000fb61.bin
d01efcc337bb4d553adda557b835c6952a347e2460375a4a796cb6241287f042		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB61 5408 bytes
font_01_sfnt_off00010da2.bin
df3800a4416464d936110fe94ae34b123a0071f7b8ddbce8bb687a8e5ac257ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA2 11048 bytes

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