Malicious PDF — malware analysis report

Static analysis result for SHA-256 efea566ec89b078c…

MALICIOUS

PDF

75.5 KB Created: 2021-02-14 23:27:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f3fba11cd34482de825c486ba9e11ee5 SHA-1: 914eb6ffd93433c68e7ac4d4e35e938904cf75b5 SHA-256: efea566ec89b078c8b07edaa20e60ea1335cdaec4c1a697e1520a9dbace26fc3
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating the presence of external URIs and embedded URLs, with one prominent URL being https://bologen.ru/wix?keyword=brinks+digital+outlet+timer+instructions. The document body, though heavily obfuscated, suggests a lure related to 'Brinks digital outlet timer instructions'. The ML classifier and ClamAV detection strongly indicate maliciousness, likely a phishing attempt to redirect users to malicious content. No scripts were extracted, but the presence of embedded URLs points to a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=brinks+digital+outlet+timer+instructions PDF link annotation
    • http://sayfelengs.space/resewunuzizufewolap94ev.pdfIn PDF document text
    • http://repair-monokoles.ru/fukulesozasawanu5ngya.pdfIn PDF document text
    • http://zikuwojanubeg.iblogger.org/i_10_traffic_report_arizona.pdfIn PDF document text
    • http://tradebot.space/alas_como_cuchillos3eg2x.pdfIn PDF document text
    • http://thelait.pro/bizagi_free_32_bitsali59.pdfIn PDF document text
    • http://samyog.ru/68537548139ec6vi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451047/normal_5ff67517845e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • http://budezeja.rf.gd/31514482677.pdfIn PDF document text
    • http://gofudawaropuz.epizy.com/11423236290.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/nedewojozisegaropavepiv.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/guitar_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/math_grade_6_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/amazon_bedsheet_shopping.pdfIn PDF document text
    • http://pavefobigemaxe.rf.gd/topographic_map_quiz.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70A 5372 bytes
SHA-256: 1cc6ced255fb56691ebbfac9d8782b601c0bcf68fde5e7ba7f936be141c59bc0
font_01_sfnt_off0000e937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE937 2232 bytes
SHA-256: 550407cae82d34704de3910030b8a6309bbe513723384b240864ac7e43bdf51c
font_02_sfnt_off0000f2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DF 10428 bytes
SHA-256: 6e5bd616ae10b5f9c9051c6237172877e5a313ae5408a1578eeb480ac6fea4f3
font_03_sfnt_off00011688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11688 2316 bytes
SHA-256: 5d01f7e752d69c1b606584a99edae90ed805fa7564def6863f1d25432a515737

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