Malicious PDF — malware analysis report

Static analysis result for SHA-256 123cfc045b092bee…

MALICIOUS

PDF

71.5 KB Created: 2021-02-12 20:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ece163f3f6fb0eac4a0b9fecfd3adeb8 SHA-1: c06b1f2673032b8fcbe1879ebff281d41dd59dd0 SHA-256: 123cfc045b092beef3abee3f739dd41792ac6840546d8872f5d479312d7510cc
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains strings that may be part of a lure, and the presence of embedded URLs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=chicago+electric+power+tools+table+saw PDF link annotation
    • https://cdn.sqhk.co/muvetowiripa/Qbgecja/analog_film_photo_filter_mod_apk.pdfIn PDF document text
    • http://cafe-cok.ru/comandos_de_mysqlcuzw1.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/fwiijge/rotexabulazolasupezuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484995/normal_601ac465a8fc9.pdfIn PDF document text
    • http://websporizle4.com/loxuzexifomixaponivolutev59w2y.pdfIn PDF document text
    • http://idem-peshkom.ru/html_to_api_githubzxwll.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447903/normal_5fffab91e70ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500668/normal_5fefebafe4f1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_601ecee81254f.pdfIn PDF document text
    • https://cdn.sqhk.co/tevenijubuso/YkJ5gjY/future_frenzy_basketball_tournament.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462345/normal_6009c7a256a01.pdfIn PDF document text
    • https://cdn.sqhk.co/furaxofir/cvzziiI/dragon_ball_idle_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzexesetaba/IeSiiIP/84351555541.pdfIn PDF document text
    • https://cdn.sqhk.co/jonimaze/9igheuv/devanamoredekelanefif.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/vuzufexarevima/39143534146.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/lupenolop.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/50388190480.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_off0000d916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD916 5332 bytes
SHA-256: d5d1e6b74c1eb1a31c24778dd4b1c654c6d2932614d6ae9bad30b03e6e78f35d
font_01_sfnt_off0000eb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3B 11136 bytes
SHA-256: 0803743ba98b3c2afdceb315a34221cd425f6f123952c93b2094036906345177

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