Malicious PDF — malware analysis report

Static analysis result for SHA-256 5280f28a3537f829…

MALICIOUS

PDF

77.7 KB Created: 2021-02-28 04:14:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd56dc1070b7eb1da6cc33610d243d07 SHA-1: 21cb666ea336b19758e23185f73fc02aa206ea26 SHA-256: 5280f28a3537f829b240166140dbfd9fd4eccff045bcb3695750ac6336af53bf
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, likely to deliver a phishing page or malware. ClamAV and ML classifiers strongly indicate maliciousness, and the document body, though garbled, suggests a lure related to Zoom settings. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/aws?utm_term=how+to+change+audio+settings+in+zoom+during+meeting
    • http://1xbet-sportstavki.fun/intel_processors_performance_ranking3eevd.pdf
    • https://cdn-cms.f-static.net/uploads/4408004/normal_601db5ff68710.pdf
    • https://wesuzekubiw.weebly.com/uploads/1/3/1/6/131607103/8721761.pdf
    • https://zejikato.weebly.com/uploads/1/3/3/9/133997407/4932472.pdf
    • http://bidizujimon.getenjoyment.net/26485434835.pdf
    • https://vodefuba.weebly.com/uploads/1/3/4/6/134688083/lotikomob.pdf
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/vonesikimex_senaramigosofan_kivib.pdf
    • https://static.s123-cdn-static.com/uploads/4446395/normal_5fec7e02e928b.pdf
    • http://jabilevij.mypressonline.com/11845563081.pdf
    • http://betflixguvenilirmi.com/lapudugofa740nb.pdf
    • http://salonvarna.com/lixogeperago3b8.pdf
    • http://sdorovie-sustavi.xyz/wallpaper_hd_for_mobile_free_download_animated4lar3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vipuxafol/tutebixukovanor.pdf
    • https://s3.amazonaws.com/fowikorejodi/lab_technician_interview_questions.pdf
    • http://resilasijajatil.myartsonline.com/zilokaboxa.pdf
    • https://s3.amazonaws.com/kezemiradigu/33579501700.pdf
    • http://kuwijiti.myartsonline.com/baby_grinch_actor_now.pdf
    • https://s3.amazonaws.com/leributafa/cache_memory_mapping_techniques.pdf
    • http://wororeba.epizy.com/79097490039.pdf
    • https://s3.amazonaws.com/fajixe/2013_highlander_oil_reset.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_off0000f142.bin
add536b4a7a47a6a8e6a270bd5c10bda406f9d44a77e9149a51b6224ac72e02b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 5424 bytes
font_01_sfnt_off000103a7.bin
641de4d0f130d52e82d4d0260df483147a236cf8deb19534172f5e5d70631974
pdf-font-stream PDF embedded font (sfnt) at offset 0x103A7 11100 bytes