Malicious PDF — malware analysis report

Static analysis result for SHA-256 87250d6d17c4979d…

MALICIOUS

PDF

76.6 KB Created: 2021-03-14 22:54:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ed209f9d148d42ad49d2f3bfc763cde SHA-1: e0dfdccb9793048fafb6a68273e2b85fc73576d7 SHA-256: 87250d6d17c4979dcb86f74517a5d09b4ed0e0538b3f98a1a184dca46fb292e6
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

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://kuzutuzo.ru/wix?keyword=disliking+books+at+an+early+age+summary
    • http://tvoyoproc.fun/salezipetutsq4x.pdf
    • http://nikecortez.net/kulevigimaniwowoa43zq.pdf
    • https://cdn-cms.f-static.net/uploads/4464297/normal_600d8836cdcac.pdf
    • https://static.s123-cdn-static.com/uploads/4425772/normal_5ff570d3e7ce3.pdf
    • http://ellmax-site.xyz/liwisifaboserojafiguivjhe.pdf
    • https://cdn-cms.f-static.net/uploads/4374002/normal_601dd46369f7f.pdf
    • https://static.s123-cdn-static.com/uploads/4376375/normal_5fdeca792565a.pdf
    • http://kayikciakademi.com/1801080714iuoc5.pdf
    • https://cdn-cms.f-static.net/uploads/4379234/normal_6009f664027b2.pdf
    • https://cdn-cms.f-static.net/uploads/4376088/normal_6044747f36ef0.pdf
    • https://cdn-cms.f-static.net/uploads/4403543/normal_603c4c3450ef6.pdf
    • http://exampl1214.com/the_cold_equationsxigl5.pdf
    • https://cdn-cms.f-static.net/uploads/4453335/normal_604b29e6cd9de.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/30827e47-3aa7-4e43-a5da-4ff765874d26/45769707927.pdf
    • http://rewuwuja.onlinewebshop.net/how_many_years_to_study_electrical_engineering_in_south_africa.pdf
    • https://s3.amazonaws.com/xebuvuwov/imagenomic_portraiture_filter_free.pdf
    • https://uploads.strikinglycdn.com/files/23f86bd2-5af6-4d18-b9fa-f7f64404a693/garmin_echomap_50_70_manual.pdf
    • https://s3.amazonaws.com/xijalovelokolep/hong_kong_monthly_weather_reports.pdf
    • http://tavoxelelenasi.onlinewebshop.net/sujedirafabuje.pdf
    • https://s3.amazonaws.com/jemisajoda/tupac_changes_audiomack.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_off0000ed56.bin
5b25f9153c589a405bcbc6893618f32b17cde7d8931a15c7d810f2c9a0f4e3cc
pdf-font-stream PDF embedded font (sfnt) at offset 0xED56 5308 bytes
font_01_sfnt_off0000ff60.bin
2375cfc69adfe9e7ea24002a401545899dde294295de5ad55fede9d97812ff0f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF60 11088 bytes