Malicious PDF — malware analysis report

Static analysis result for SHA-256 946128f5a4080bc7…

MALICIOUS

PDF

79.6 KB Created: 2021-02-01 18:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 779762da86aba3be2e9c1bde1d1ef2ad SHA-1: 9d71e6f89d535a48d425dfbf9c01c340330ad888 SHA-256: 946128f5a4080bc771ed7462cf54d92f235748062989e99a53fdcd9a28ed6098
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains text suggesting it is a lure for online content. The presence of multiple unknown URLs, including one that appears to be a phishing domain, further supports this assessment. No scripts were extracted, but the PDF structure itself likely contains malicious JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/123?utm_term=watch+ready+or+not+online PDF link annotation
    • https://cdn.sqhk.co/levowexesu/iHjaGim/xen_the_alien.pdfIn PDF document text
    • http://gravkamen.ru/binary_addition_examplesi3fln.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/70Dwk0E/real_razor_prank_apk.pdfIn PDF document text
    • http://idealica-ituficiale.website/10176520231arnbc.pdfIn PDF document text
    • http://detonic-shop.website/62687544696tj1wq.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/dutimajizowa/kewewaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/34903329384.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/4149022509.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/lomaxagosatojetedetelevix.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/python_2._7_for_ubuntu_16.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/view_icloud_photos_on_iphone_without_ing.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/dabubovifidu.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/xajinokelapiso.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/kowakonezizirajukika.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/94839986991.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/rezuzifuweparomokewufe.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/povuwubudusigetuvuzivo.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/mobasawirodabu.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/87277785612.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/29301755868.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/67208420302.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/5591515648.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC0 4964 bytes
SHA-256: 5a01de2e5a6da1e6ec4dd7a1f1a3ae0ccbeb70c3c3e121f1ec9b3a44163ae4b2
font_01_sfnt_off00010bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB1 11324 bytes
SHA-256: fd4cd7be0f56d1c73f58fcbc2e820711eb087283fe17ad675f1c659c1f3a88d8

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