Malicious PDF — malware analysis report

Static analysis result for SHA-256 239e63d901a34153…

MALICIOUS

PDF

72.5 KB Created: 2021-03-02 16:17:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 290b59eb0e44f52b4a1751b53ded2f92 SHA-1: dea6e2a1f7a032d8ca73ba8edf2bd65c36704772 SHA-256: 239e63d901a34153881845da114d53a0f38a3da03c152ee8d1d68be71e9f0b4c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. The embedded link is designed to trick users into visiting a compromised site, likely for credential harvesting or further malware delivery.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/123?utm_term=navy+correspondence+courses+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374983/normal_601d6a1f6371b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454541/normal_6021437a58f87.pdfIn PDF document text
    • https://tusozokusex.weebly.com/uploads/1/3/4/6/134678333/510d50e3928551.pdfIn PDF document text
    • http://vataponuxizeliz.mywebcommunity.org/33311344026.pdfIn PDF document text
    • https://nosovaranipad.weebly.com/uploads/1/3/4/7/134743093/pozawivasodedubofa.pdfIn PDF document text
    • https://vojituletakez.weebly.com/uploads/1/3/0/8/130874409/fe218b5934429a.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/aijdwlt/wifeza.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/aNicf3o/34201887358.pdfIn PDF document text
    • https://tezilejesitox.weebly.com/uploads/1/3/1/1/131163634/17ae90b7c78a320.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bumerezuwo.epizy.com/tilekafisaso.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/la_gazzetta_dello_sport_serie_b_classifica.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/ielts_test_academic.pdfIn PDF document text
    • http://pirarotuweze.rf.gd/78974877551.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/what_are_the_5_elements_of_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/windows_10_activation_key_free_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/11_half_yearly_answer_key_2018.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/dusomovuxo.pdfIn PDF document text
    • http://rukodulaban.epizy.com/84187170058.pdfIn PDF document text
    • http://kepepisex.epizy.com/28564812075.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_off0000e013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE013 5196 bytes
SHA-256: aa2a6c156d8b389a8a32a69c3e0ef0c461e8cd0cff4fa10194b344ce1fe5918e
font_01_sfnt_off0000f1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E1 10376 bytes
SHA-256: ac2886390f81611babae87c5496dc61bd67c643424f93e5f4832cc01e491020c

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