Malicious PDF — malware analysis report

Static analysis result for SHA-256 5880c8ab6c6b7e3a…

MALICIOUS

PDF

75.4 KB Created: 2021-03-20 20:38:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d5319affc09dc05b2e97fdc6e222b57 SHA-1: d048970d0eef268c033e3a3d2c41264a55aaace1 SHA-256: 5880c8ab6c6b7e3a2efbda87ec8418183544bf39ee0065610f43fe3485ccba5a
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 critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs, such as 'https://midufefew.ru/wix?keyword=peak+pdf+book', suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to PDF creation, but the primary threat appears to stem from the external links.

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://midufefew.ru/wix?keyword=peak+pdf+book
    • https://bifukedupojuxi.weebly.com/uploads/1/3/4/4/134498794/tavogotu-sepatudenurowas.pdf
    • http://hookup154.online/hp_elitebook_folio_9470m_price_in_nigeriav9pti.pdf
    • http://copyright-central-media.com/74024390466zx9l3.pdf
    • https://cdn-cms.f-static.net/uploads/4500669/normal_6025bae11344f.pdf
    • https://cdn-cms.f-static.net/uploads/4469850/normal_60387ce599c6c.pdf
    • https://cdn.sqhk.co/jegamaxegev/xhgifji/71218653053.pdf
    • https://cdn.sqhk.co/xekemini/gii5jhK/video_poker_app_for_ipad.pdf
    • https://nububoreral.weebly.com/uploads/1/3/4/4/134467099/ximikofizusixuroxok.pdf
    • https://cdn.sqhk.co/nozedimasav/ifgggeP/27563739619.pdf
    • https://cdn.sqhk.co/gojikanemiju/lC8eZJk/english_grammar_exercises_for_beginners.pdf
    • https://cdn-cms.f-static.net/uploads/4427529/normal_6037c3dd79c76.pdf
    • https://cdn-cms.f-static.net/uploads/4401711/normal_6050246e389c2.pdf
    • http://swiss-gear-top.xyz/how_to_reset_samsung_soundbar_remoteybwle.pdf
    • http://gooddevice-online.com/14269892809ax8bj.pdf
    • https://cdn.sqhk.co/naziwixolagu/fihjihb/96158930411.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tuletivotarupu/razokojod.pdf
    • https://s3.amazonaws.com/tubukeganuji/gefuxa.pdf
    • https://s3.amazonaws.com/rekorewexidiwo/lotus_carlton_prices.pdf
    • https://s3.amazonaws.com/fejififimaketo/crash_course_biogeochemical_cycles_worksheet_answers.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_off0000ea90.bin
44e2c995aaed8f0c23c92dac3a30abab2d63643973d0abd9c80f52720ad29e7f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA90 4936 bytes
font_01_sfnt_off0000fb73.bin
1664ecc573bc41350161961dc7aed0c9afabf62225dd31d342b74ab6595ad9c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB73 10972 bytes