Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17a253549ea3c53…

MALICIOUS

PDF

78.3 KB Created: 2021-02-02 12:43:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8d471704f88e3e867df916dec6f57383 SHA-1: 2cadd9c238c42fd44135e2b2a9d0cf0680468484 SHA-256: f17a253549ea3c53df47cee1e6fa9236dc15744c8156cc46f7c1010c004f103c
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV and an ML classifier as malicious. It contains multiple embedded URLs, with one specifically identified as an external URI pointing to 'https://druttle.ru/aws?utm_term=best+information+technology+magazines+in+india'. The document body is heavily obfuscated, preventing a clear understanding of its content, but the presence of numerous suspicious URLs suggests a phishing or malware distribution attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=best+information+technology+magazines+in+india PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381529/normal_6003a4cc62fbd.pdfIn PDF document text
    • http://obzorov.site/lexus_is250_manual0b80e.pdfIn PDF document text
    • http://matroskin.space/jowiwagisilimopobimerifaw85jt8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484122/normal_5fd976d8b99c0.pdfIn PDF document text
    • https://cdn.sqhk.co/nujorazaje/VtifmJd/speedy_cash_loans_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414174/normal_5feeb1c67f653.pdfIn PDF document text
    • http://fullpisetc.ru/remoxuzisukolesemi5yklg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5fe7da3a2ed0a.pdfIn PDF document text
    • http://infonewstravel.com/ham_radio_general_study_guideks4vg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446151/normal_5ff84865cc068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459935/normal_5fe8cb5b1882c.pdfIn PDF document text
    • http://constructionhouse.info/472567548445gl31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422386/normal_600d3b768810b.pdfIn PDF document text
    • http://microdigitalmeter.xyz/dasabuwapatetakoxca4j2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496586/normal_5fee8392596f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F3 5636 bytes
SHA-256: 5d7cd4e6f8de9bbaf1a3000aa61b144a2b86fe6ae7de9a072ed0dba708f39bfa
font_01_sfnt_off0001070b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070B 10908 bytes
SHA-256: 19b15719389f5c3c735835f8b3ec879364d414a7838ac17b266863fd926f398b

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