Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4a2b4d31ac0cec…

MALICIOUS

PDF

96.8 KB Created: 2021-02-16 08:15:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5d13904bcc45d25b44c03f4c478e178b SHA-1: a629c9e83f3fb37d71550e24ec26d5370e8082e7 SHA-256: 2a4a2b4d31ac0ceca185fa1685634ae27115fb5de0e9b422c9291f625f3283a3
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The presence of embedded URLs and the overall detection by security tools strongly suggest a phishing attack vector.

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=%25D0%25BC%25D0%25B0%25D1%2582%25D0%25B5%25D0%25BC%25D0%25B0%25D1%2582%25D0%25B8%25D0%25BA%25D0%25B0+5+%25D0%25BA%25D0%25BB%25D0%25B0%25D1%2581%25D1%2581+%25D0%25BF%25D1%2580%25D0%25B8%25D0%25BC%25D0%25B5%25D1%2580%25D1%258B PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414866/normal_60248e436ead7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404520/normal_5feeb90dc73d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481675/normal_5fffdae517f30.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/Bejejcj/vepozazodokuteweso.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/igdl6ie/24612414961.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/Fghgcmy/starr_fall_river_400_stanley_st.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469849/normal_5fd8ccc911e87.pdfIn PDF document text
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/d11c2c.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/4857941.pdfIn PDF document text
    • http://edapog.online/homogeneous_at_heterogeneous_na_wikak05n4.pdfIn PDF document text
    • http://verifybadgehelp.com/buxefunaziwiseginebrwj3m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384831/normal_5fedd2d613856.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_off00012f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F18 5420 bytes
SHA-256: 2d52fdaf388b99eab1ec5b010677587b2bb5e1fe0ba894092f180aef8d70e7f5
font_01_sfnt_off00014173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14173 16144 bytes
SHA-256: 54f7e10414b3f2e0acf33f047cf4afee3b16009085a03eaeb32a25b783c0a114

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