Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6b3959c5850171…

MALICIOUS

PDF

78.1 KB Created: 2021-03-21 09:11:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4766def2c1366ac872e350d33d6e3b32 SHA-1: 307ad5c36a49f31439937f9dfc4b93ea1611a387 SHA-256: 1e6b3959c5850171627e85e4103783512b94064244c820be22bc209ab81dfbc5
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers. It contains an embedded URI pointing to a suspicious domain, likely intended to host a phishing page or download further malware. The document body, though heavily obfuscated, suggests a lure related to educational worksheets.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/wix?keyword=separation+techniques+worksheets+grade+6
    • https://cdn-cms.f-static.net/uploads/4418385/normal_604f9a5baacbe.pdf
    • http://prizinsta24.space/nc_commercial_drivers_license_practice_testd0819.pdf
    • https://cdn-cms.f-static.net/uploads/4476437/normal_5fd16215edd28.pdf
    • http://wordwild-store.com/753351899778yi7j.pdf
    • https://cdn-cms.f-static.net/uploads/4466676/normal_602008dd66ea5.pdf
    • http://bibopasaxuvibu.mypressonline.com/zodiranukif.pdf
    • https://cdn-cms.f-static.net/uploads/4496372/normal_605560e7186f1.pdf
    • https://cdn-cms.f-static.net/uploads/4443354/normal_602ee1b93b1a4.pdf
    • https://cdn-cms.f-static.net/uploads/4413118/normal_6017443874841.pdf
    • http://twirlini.com/nipisiwozes7tm36.pdf
    • http://tonedomopoja.scienceontheweb.net/can_a_highlander_hybrid_tow_a_trailer.pdf
    • https://static.s123-cdn-static.com/uploads/4485156/normal_5ff3473520a87.pdf
    • https://cdn-cms.f-static.net/uploads/4481170/normal_5fda7093e1fb7.pdf
    • http://euroshopme.site/14780881057f4iwu.pdf
    • http://deteluwo.iblogger.org/piguvitosefuwatekij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jizonizop.rf.gd/castellan_fisico_quimica.pdf
    • https://uploads.strikinglycdn.com/files/47c00649-846e-4e02-a8f6-2298e1c5bc1a/what_is_the_importance_of_knowing_the_perspective_of_the_ff_anthropology_sociology_political_science.pdf
    • https://uploads.strikinglycdn.com/files/b5f313d5-a913-41a1-ac66-5f850b7d930e/20724597885.pdf
    • https://uploads.strikinglycdn.com/files/88b0a24d-a7ea-4a2b-86aa-9e3314ff9814/can_i_delete_ntuser.dat.log1.pdf
    • http://lobopekogolo.onlinewebshop.net/new_york_philharmonic_principal_horn_audition.pdf
    • http://xugonowelimije.epizy.com/burj_khalifa_dubai_information.pdf
    • https://uploads.strikinglycdn.com/files/438e96be-0cf3-4faa-ab2f-5b5bc7dfb409/18835946291.pdf
    • http://bimejevitugera.epizy.com/temadibiwovoweta.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_off0000f300.bin
c0baf2f80a0852450b4dc775b42304f837ea6d3b55769ec0ee457b4009b6f3d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF300 5844 bytes
font_01_sfnt_off000106e6.bin
097a43981bd6e32eda79f3ef4367e9858ee6fbb7ca57cd9973a2ccf4444755c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106E6 10508 bytes

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