Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4eefd062f567995…

MALICIOUS

PDF

85.8 KB Created: 2021-04-27 04:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca8ff4b1984280b26ff2eadad83dc9c8 SHA-1: dd44be9e41a0bc0cf9230a5a12ba56a64d11eb88 SHA-256: d4eefd062f567995d8210ac54f42155c40bcc69b2f7f47dc04e8a79911ad209e
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The primary malicious indicator is the external URI, which is likely used to host phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/strik?utm_term=dibujos+de+rostros+para+dibujar+faciles
    • http://didazema.mypressonline.com/simple_rectifier_circuit.pdf
    • https://wefikugozakilo.weebly.com/uploads/1/3/1/0/131069992/4155104.pdf
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/655560.pdf
    • http://hookup157.online/bibawo_by_eddy_kenzo_mp4wos9r.pdf
    • https://static.s123-cdn-static.com/uploads/4475586/normal_5fed75b80367f.pdf
    • http://upgrade4me.com/difference_between_adobe_premiere_pro_2018_and_20190aela.pdf
    • http://fegiroxopirez.sportsontheweb.net/simplification_and_approximation_questions_for_bank_clerk.pdf
    • http://pafiwuz.66ghz.com/20930340551.pdf
    • https://pedadadaroteb.weebly.com/uploads/1/3/0/9/130969242/5989183.pdf
    • https://cdn-cms.f-static.net/uploads/4369629/normal_6052e7a126a57.pdf
    • http://cardioactiveitalia.site/datetapufurabiguvegodigoxwpjs.pdf
    • http://teksalon.xyz/jevopesejeladirxj9uq.pdf
    • http://pewodebepefawi.scienceontheweb.net/possessive_adjectives_elementary_worksheet.pdf
    • https://cdn-cms.f-static.net/uploads/4410020/normal_601b670241d64.pdf
    • https://dofixojibol.weebly.com/uploads/1/3/0/8/130874360/tubefem.pdf
    • https://mesikanuxiruk.weebly.com/uploads/1/3/1/6/131636832/xesizudogiwegodol.pdf
    • https://cdn-cms.f-static.net/uploads/4459469/normal_6051c43714667.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zaxitow.epizy.com/enki_y_enlil.pdf
    • https://s3.amazonaws.com/gurafoga/java_jdk_8_mac_os_x.pdf
    • http://warufadul.rf.gd/basebugeguwi.pdf
    • https://s3.amazonaws.com/xetasif/dimakebizizosanapofone.pdf
    • https://s3.amazonaws.com/suximawo/jabipibol.pdf
    • http://zixadadafupeg.epizy.com/bazaar_movie_song_likewap.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
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100d0.bin
aed824be9dd5ad9afd1efadae0209b6885d3cb5452f7d2e4a90ceb213eb287e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D0 5364 bytes
font_01_sfnt_off0001131a.bin
e4947fc58bf133b9dd8b57cbc0d8f8687fe0385ba7a435c664ca458fc44c8e70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1131A 11392 bytes
font_02_sfnt_off00013836.bin
6c0f9477d199d7f083f879eb409295c8161e1a477622bc876bab5dc839212411		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13836 6128 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.