Malicious PDF — malware analysis report

Static analysis result for SHA-256 51cef9e6e262b985…

MALICIOUS

PDF

70.7 KB Created: 2021-02-20 08:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d91826e7b7dfa46797f6c2826dd5c962 SHA-1: 93ed78f0f6441c95a8e9a2dfefc64f1453de329b SHA-256: 51cef9e6e262b985d61498f6b15d69cccb7f669f2d5e191f409282df1eb9ef79
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. The embedded URL suggests an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=major+lazer+lean+on+mp3+ringtone+download PDF link annotation
    • https://cdn.sqhk.co/minamojazi/hhgCojb/29016361413.pdfIn PDF document text
    • http://useporte.xyz/kangaroo_reproductive_systemz5tqk.pdfIn PDF document text
    • http://dostafood.xyz/dofenugusubajiwajoz4p304.pdfIn PDF document text
    • http://apparentlyopt.com/750736714262khln.pdfIn PDF document text
    • http://women-ita.space/how_to_be_a_master_storytellerk0vkd.pdfIn PDF document text
    • http://newberginvestmentproperty.com/1436310422847j10.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/jdLihUD/29799173653.pdfIn PDF document text
    • http://kurewegunopef.66ghz.com/birthday_cake_photo_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/panisip.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/nelipoxenalativem.pdfIn PDF document text
    • http://kafokenenore.rf.gd/25049330405.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/kitiwenubejajejaroxiwuwiz.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/70316170386.pdfIn PDF document text
    • http://winenezufu.epizy.com/ccna_voice_free.pdfIn PDF document text
    • http://tupudenijusab.rf.gd/kidaratufomatepupadoful.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/rovoroxawepu.pdfIn PDF document text
    • http://mulozeraxepe.epizy.com/25540613547.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/gixilebijexul.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/teruxogidixodurajafa.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/cuentos_2_edgar_allan_poe.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_off0000bc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1B 5488 bytes
SHA-256: 4ecb238f42e215f4c481c3d160049958dbb56eaef9e3b8df1597155f6bf3be6b
font_01_sfnt_off0000ceda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDA 10240 bytes
SHA-256: 417e7848eaba4dcf27a6dea78881ae8cdeba13aa6f45a7c4f69bce2e487d3b09
font_02_sfnt_off0000f23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23A 17792 bytes
SHA-256: 6195574b8c4a8b4505e4b7461c9d4b6b0bb35b0c6676571879e34d36f2ca5305

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