Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c6fc7f128486ad…

MALICIOUS

PDF

89.7 KB Created: 2021-05-21 05:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f52838c849add4f287c2053726e9308 SHA-1: 2f471202648d6e5abd7af70da0468bd00875578d SHA-256: 34c6fc7f128486ad36a96c8d1c00436df493ba5383f6bf1392f646b69605b69a
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body contains a question about a square root, which is likely a lure to encourage users to click on the embedded URL. This URL, https://botokaw.ru/strik, is the primary indicator of compromise and likely leads to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/strik?utm_term=qual+%25C3%25A9+a+raiz+quadrada+de+225%252F361
    • https://lerexujirizafet.weebly.com/uploads/1/3/4/3/134344290/8a7e74a8c33.pdf
    • https://cdn-cms.f-static.net/uploads/4472774/normal_600a90d48f6ef.pdf
    • https://static.s123-cdn-static.com/uploads/4366375/normal_5fddb345b65cb.pdf
    • https://cdn-cms.f-static.net/uploads/4424400/normal_606b3d4809c86.pdf
    • https://bufekebutejef.weebly.com/uploads/1/3/1/8/131856184/2787226.pdf
    • https://mufewikusa.weebly.com/uploads/1/3/4/0/134042586/norirutomomo.pdf
    • https://cdn-cms.f-static.net/uploads/4366047/normal_603d1bb3c609f.pdf
    • https://jakikoxu.weebly.com/uploads/1/3/1/4/131411542/6914677.pdf
    • https://risixugetiso.weebly.com/uploads/1/3/5/3/135317557/fuxufawegikixakokid.pdf
    • https://static.s123-cdn-static.com/uploads/4448116/normal_5fff23a526509.pdf
    • https://static.s123-cdn-static.com/uploads/4390996/normal_5ffdb9e49e2d2.pdf
    • https://mabexerezigija.weebly.com/uploads/1/3/5/3/135324341/a7f8b61834847a4.pdf
    • https://static.s123-cdn-static.com/uploads/4403141/normal_5fe2139ee5313.pdf
    • https://cdn-cms.f-static.net/uploads/4386079/normal_600b9ea99d608.pdf
    • https://sunajekivogemaz.weebly.com/uploads/1/3/4/8/134895881/41949.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2065c7ff-c9ed-4a81-9a38-44fd19b64d00/used_hpi_baja_5b_for_sale.pdf
    • https://s3.amazonaws.com/jamuluvuvava/xobekijux.pdf
    • https://s3.amazonaws.com/vasofirida/aristocats_piano_sheet_music.pdf
    • https://uploads.strikinglycdn.com/files/2defc4d7-eb8e-46b5-8277-b533de78016c/far_part_117_table_b.pdf
    • https://uploads.strikinglycdn.com/files/5886929d-40b4-4274-8929-070c1ee4cb98/casio_ctk_7200.pdf
    • https://s3.amazonaws.com/wibedubosateg/tokutokixobepado.pdf
    • https://s3.amazonaws.com/kosamupim/80872450048.pdf
    • https://uploads.strikinglycdn.com/files/1cff16d8-7785-4b99-bdb7-509f50e76a17/how_to_put_together_schwinn_ic4.pdf
    • https://s3.amazonaws.com/matogapibelifiv/49395706175.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012413.bin
c5d1d445f8cbcdd93fd53615ca065fd09a4d89b5ccee70b9b6d5643a4d911eda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12413 5680 bytes
font_01_sfnt_off00013741.bin
8b5b1c3d8f203bfb436ba2fdf8a00936d3e51f771724a9f04570d3b38ae971f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13741 9404 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.