Malicious PDF — malware analysis report

Static analysis result for SHA-256 41cdbb9df45cf323…

MALICIOUS

PDF

93.2 KB Created: 2021-03-20 16:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19e90032ca10eb33fb87f00fe9c69ba6 SHA-1: b35c4d68ece9eec62980db7fd0dcee89874c6982 SHA-256: 41cdbb9df45cf32384489ab7ba76d2697ea7c643825895ba547552744249dc3c
96 Risk Score

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 ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://golowaki.ru/award?keyword=cultivo+de+cebolla+china+en+peru+pdf
    • http://voztrans.ru/the_art_of_mackin_free_downloady99sy.pdf
    • https://cdn-cms.f-static.net/uploads/4483608/normal_60328eebb6146.pdf
    • https://cdn-cms.f-static.net/uploads/4466673/normal_6016480f771b7.pdf
    • https://cdn.sqhk.co/zubavagi/0esjg5n/mazodix.pdf
    • http://nyvelsets.online/ecology_worksheets_middle_schoolstjon.pdf
    • https://static.s123-cdn-static.com/uploads/4376852/normal_5ffbd3a157f96.pdf
    • https://static.s123-cdn-static.com/uploads/4401982/normal_5ffdc4c2f1fc6.pdf
    • http://filanion.online/android_studio_ndk_path_ubuntu0934e.pdf
    • https://cdn.sqhk.co/wurivado/MapKji1/icivics_one_big_party_vocabulary_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4380871/normal_603b8fc4d87b1.pdf
    • https://cdn.sqhk.co/vizelupavew/bge6hgr/striker_soccer_america_2015_mod_apk.pdf
    • http://idealica-uficiale.website/ridowokijopibujomibqh.pdf
    • http://kulinar2020.site/80710420544bowzf.pdf
    • https://cdn-cms.f-static.net/uploads/4492575/normal_603fe27d6f7e3.pdf
    • https://static.s123-cdn-static.com/uploads/4416322/normal_5fde140f34230.pdf
    • https://cdn-cms.f-static.net/uploads/4488101/normal_605492b62a09d.pdf
    • https://cdn.sqhk.co/kimejijomaki/jfAPNgf/interesting_facts_about_asteroids_belt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_1aa29c4279d345eeaf4a97e72067457c.pdf?index=true
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_db962fa4a45c44a3bab4b7fcb2d16c5d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ff5857af-3baf-4349-ad95-265721efcd32/72445348490.pdf
    • https://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_3766387db2f74553a5f4e37d92d77be6.pdf?index=true
    • https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_726a3233a6fd4120908d83f5e4364424.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ce35da4d-1610-43d2-bce6-42da6db1c983/how_to_control_anger_in_islam.pdf
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_29744d547686472d84407b76d1f5bf2a.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a36.bin
68fef29923ec9495ad22431ef0146f7e10d4154a754f0d10000bd033216a8bcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A36 4640 bytes
font_01_sfnt_off00012a5a.bin
0c05455e20de5d9964055b520a97b13eb0ffc8816e4b9ad131b2b495855ab3d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5A 5168 bytes
font_02_sfnt_off00013bea.bin
e4ed3148a559fc63a2707c4f288071a1a5c7454cb4b070cdb6f0d7bf2dd3ef28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BEA 12536 bytes

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