Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ffebc8f32f90ca4…

MALICIOUS

PDF

76.6 KB Created: 2021-02-19 18:26:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 0ee720f171a187dacbfcd20dff5dd012 SHA-1: 87fb2d5d25d613966d72212cee6e187dda7ccd17 SHA-256: 5ffebc8f32f90ca4ad1c43c052042ca33514f4b51c005247793ce8c3e2579e46
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 an ML classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, which is likely used to redirect the user to a phishing or malware-hosting site. The document body, though heavily obfuscated, suggests a lure related to a weather station manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=acurite+01512+pro+color+weather+station+manual PDF link annotation
    • http://6gusevshop.website/16322960759gcz8e.pdfIn PDF document text
    • http://pevawafo.iblogger.org/tifavijamupigejubezabajoz.pdfIn PDF document text
    • http://texewofe.22web.org/determining_limiting_reactant_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/hchicBC/ninja_fighters_multiplayer.pdfIn PDF document text
    • http://help-business-media.com/perelenironogaxfj39v.pdfIn PDF document text
    • http://lolukibokon.iblogger.org/google_spreadsheet_excel.pdfIn PDF document text
    • http://fishland.store/7699504090z6ofx.pdfIn PDF document text
    • http://8gusevshop.space/milady_barber_textbooki3v6s.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/saziwijaxodav/dikadalavamerarom.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/fallout_shelter_child_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/am_i_pseudo_intellectual.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/big_red_cloud_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/zexoxukaxutiboko.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/btwin_triban_3_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/61954004624.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D1 5704 bytes
SHA-256: bee60432c7babb4754d137c16e6767c95046ec715d5cf1533a96a94c51318cf8
font_01_sfnt_off0000f429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF429 2092 bytes
SHA-256: 7ad5299a62e4d8886873c1431de3efdf3a5cdfe24d855072229b7bb97c183302
font_02_sfnt_off0000fd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD34 11152 bytes
SHA-256: bad03472a08b81ec888cb221f69c0153d4585c5614e85e6aa1852b0d8018a598

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