Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3c9c3370f9bc60…

MALICIOUS

PDF

74.0 KB Created: 2021-03-06 05:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4885d9d81c2ae1e0bb1b760f0bc5687f SHA-1: 3bd96dd18f40e707448d71beaa25c3c3bc17faf5 SHA-256: df3c9c3370f9bc6075d23c8e7fcba1f43e23dbc3856861240e2da7bdf705d2f4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to 'pentair screenlogic interface' and a URL, suggesting a lure to a potentially malicious website. The presence of embedded URLs further supports the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://zajinet.ru/123?utm_term=how+do+i+reset+my+pentair+screenlogic+interface PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495843/normal_6017383cce56f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379241/normal_5fe050992e379.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448976/normal_5fce5f03a88a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492897/normal_5ffb0a1b86090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369502/normal_5fe3c450dc365.pdfIn PDF document text
    • http://xidufefonudug.sportsontheweb.net/built_2_last_tattoo_thomaston_ga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497370/normal_6036b38daa010.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450138/normal_5ff389944e7a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422161/normal_5ffa3ec72c9d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416149/normal_5fdfc53f4611a.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/zozidosas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5fe98ce566d98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470405/normal_602b57f69881b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459477/normal_5fefd39a224eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454419/normal_601690e29935c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_603aafe9d3d06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366980/normal_60036beec1133.pdfIn PDF document text
    • http://koxivesuvif.mypressonline.com/keurig_b60_replacement_parts.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/the_killing_pact_2017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476146/normal_603e7f50da21d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411917/normal_5fdcadcb376c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jowawaba.atwebpages.com/spanish_essential_oils_desk_reference_6th_edition_free.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_off0000e26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26D 5632 bytes
SHA-256: a3669f79a201233afba0a36ca1abdaea4f1b9497bc495090298c680c29335f04
font_01_sfnt_off0000f594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 10724 bytes
SHA-256: 6232b9b70f9b2d04be5e0e9cbce1a097199af7f50115dd49895d08c02e242443

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