Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17fa97f8bc8954f…

MALICIOUS

PDF

198.5 KB Created: 2021-03-20 07:33:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: f13665f03ee068c87f62e79bfc30d858 SHA-1: 29d4fb58b44c8ea485c385d3f9898151945d343b SHA-256: e17fa97f8bc8954f5c79aac29b9619c9d00f2c40e5f273467e787b2325862fca
156 Risk Score

Malware Insights

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

The file is a PDF that impersonates the Norton brand, a critical finding indicating a credential phishing attempt. It contains an external URI pointing to a URL that redirects to another PDF, likely to host the phishing content. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attack pattern involving redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://nulasexojexof.weebly.com/uploads/1/3/4/0/134012614/figepenovusorat-tazatomokuli-zuwexutud.pdf.
  • 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://jacksth.ru/strik?utm_term=alexander+the+great+empire+map+today PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370780/normal_5fcb6dfba8fa1.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/jigMihs/91738228392.pdfIn PDF document text
    • https://nulasexojexof.weebly.com/uploads/1/3/4/0/134012614/figepenovusorat-tazatomokuli-zuwexutud.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvakumo/PhjCgeM/gunnersaurus_costume_for_sale.pdfIn PDF document text
    • https://sufusaripowo.weebly.com/uploads/1/3/1/4/131437865/7450122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446491/normal_60534157b750b.pdfIn PDF document text
    • https://ralixuviromod.weebly.com/uploads/1/3/5/3/135345966/4640527.pdfIn PDF document text
    • https://cdn.sqhk.co/fazologim/jfy0Ygf/selfie_bebo_sambalpuri_song_video.pdfIn PDF document text
    • https://tosulabemolajeg.weebly.com/uploads/1/3/1/8/131871730/zezar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378410/normal_6005c18a6e1f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392453/normal_602de83128285.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528876/normal_5fd091db8031b.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/ihp5geQ/oklahoma_state_basketball_tickets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_b8cc4b6301cb4fd981977feaa2d1a7f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/35578623026.pdfIn PDF document text
    • http://rakejobik.epizy.com/bahubali_2_ringtone_telugu.pdfIn PDF document text
    • http://rilasiwawizumo.rf.gd/54127064554.pdfIn PDF document text
    • http://gawekavadave.epizy.com/cryptococcal_meningitis_guidelines_2014.pdfIn PDF document text
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_140d3dfcb7384383ba6010d7e8420075.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/samsung_un40h5003af_remote_control.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002a68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A68F 5356 bytes
SHA-256: ed8983d6e7a55a456484a5345c22ef95cd44a9a6daaa961e8c1a71b40a5bd591
font_01_sfnt_off0002b8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B8A9 19720 bytes
SHA-256: 3122d367de6615287e6fde7e7c3bb484685f1abc645385bdafc4b73e634dc959
font_02_sfnt_off0002f03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F03F 17352 bytes
SHA-256: 8beb830b4ca91fb78977baebfdccd0b1965dca9a2860408ff99dd298e33651c8

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