Malicious PDF — malware analysis report

Static analysis result for SHA-256 675ac10f9bc7cb4e…

MALICIOUS

PDF

99.9 KB Created: 2021-05-07 20:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a722a99d8455f2db57eb5b876feb898d SHA-1: bf996a19abcd56cbb867106a81a637915f81ea37 SHA-256: 675ac10f9bc7cb4e066807ab3e13a963b96c659db1091947d18518f5e81561ad
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site, possibly to download a second-stage payload.

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://vilenefex.ru/strik?utm_term=dapple+dachshund+puppy+for+sale+in+florida
    • http://padodalowitit.iblogger.org/btec_level_3_business_book.pdf
    • https://cdn-cms.f-static.net/uploads/4368266/normal_6054e05141056.pdf
    • http://lofupijuwox.22web.org/77697908869.pdf
    • https://cdn-cms.f-static.net/uploads/4481985/normal_6020638fd9661.pdf
    • http://tafafudezadevit.22web.org/kali_linux_default_password_vmware.pdf
    • https://cdn-cms.f-static.net/uploads/4415080/normal_5fd2e21b9a447.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xavobuwog.epizy.com/sufizaxawemesuwigezabepe.pdf
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_a7c7e331c84748d9ba5bae15e5f34218.pdf?index=true
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_9d9a4e293b28412b8ee9f65d16eecba1.pdf?index=true
    • https://s3.amazonaws.com/jeduzizonox/19730025519.pdf
    • http://dovabaz.epizy.com/tesotupep.pdf
    • https://s3.amazonaws.com/widiku/championship_form_table_sports_mole.pdf
    • http://robexekipojop.rf.gd/diminuendo_means_the_same_as_answers.pdf
    • https://e510c2d5-567e-4a96-89ff-abc18316baf7.filesusr.com/ugd/8a9bcc_03345bb5d3564dbbb06ca0fd02d1f77c.pdf?index=true
    • https://s3.amazonaws.com/nemafu/jamawoz.pdf
    • https://s3.amazonaws.com/xamibudasagas/z390_aorus_master_user_manual.pdf
    • https://3df016ad-b40f-424f-9918-b96c60f46212.filesusr.com/ugd/387bfe_7894a497e936478d9e78798cf9ee7c3f.pdf?index=true
    • https://s3.amazonaws.com/bepukuba/8519227124.pdf
    • http://faxumev.epizy.com/dokeguru.pdf
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_050e5682593446b39eddfac68bdf63a2.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_off0001425d.bin
b2ead8f77cd94004709987b6e5de85e8aa57add76d9ec2e33ea0d3dba4fa04ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x1425D 5344 bytes
font_01_sfnt_off00015495.bin
f5a23ab30c606d79c2e4cacb6231e7404c13ca3cd2ea0843d93f485aee142155
pdf-font-stream PDF embedded font (sfnt) at offset 0x15495 13092 bytes