Malicious PDF — malware analysis report

Static analysis result for SHA-256 16aed82c3b0ab1da…

MALICIOUS

PDF

81.0 KB Created: 2021-04-01 07:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 508c4eea6ffba8cf3de8844812da671e SHA-1: d098ef4adf8112d3ec70d322804e057c4989fa9b SHA-256: 16aed82c3b0ab1da6e01853555eb602e925190e9e9ac34920332776c2272de4c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a URL disguised as a free sheet music download, which is a common phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload or phish credentials. No scripts were extracted, but the presence of external URIs suggests a download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/award?keyword=christmas+carols+sheet+music+pdf+free
    • https://cdn.sqhk.co/rizikodeni/Yhjigif/gulabi_aankhen_song_old.pdf
    • http://tusiteguluvora.getenjoyment.net/32574233964.pdf
    • https://cdn.sqhk.co/datisafapuv/shjnjcO/denaw.pdf
    • https://cdn.sqhk.co/zuronenom/ZWogi6Y/zuziroferavepuzosovilonol.pdf
    • https://cdn.sqhk.co/rujiwujik/c9ncibO/48706833175.pdf
    • https://cdn.sqhk.co/jasurisunav/hUchdjg/gitos.pdf
    • https://cdn.sqhk.co/zogobadakedu/hk8Jmjd/swot_analysis_examples_for_engineering_students.pdf
    • https://cdn.sqhk.co/voxobidivel/dCVrGjc/labyrinthitis_physical_exam_findings.pdf
    • http://dasuwupozu.22web.org/what_are_the_sociological_factors_that_affect_human_behavior.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://buxozininexe.epizy.com/mawegifarelas.pdf
    • http://sulunaza.epizy.com/sasixawel.pdf
    • https://uploads.strikinglycdn.com/files/43f6dea2-50a6-4f7d-8fdd-6abcfb65fac5/62020618407.pdf
    • http://rebipilu.epizy.com/what_does_the_choke_on_an_engine_do.pdf
    • http://kikadunutifowew.rf.gd/wazawowopulekamigiv.pdf
    • http://widepidaba.atwebpages.com/almost_is_never_enough_piano_chords.pdf
    • http://dibawuleseba.rf.gd/figox.pdf
    • https://uploads.strikinglycdn.com/files/f2a93a1c-20b5-4bb0-b137-e1547cd6954c/videwidafesawexajamez.pdf
    • https://uploads.strikinglycdn.com/files/83d187d7-9a12-43fa-a67a-da4dbfa22972/xixaxuziv.pdf
    • http://feluwagosipo.rf.gd/download_soal_skb_guru_agama_islam.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_off000100e5.bin
e77afbbe48abe83abefaac84b8f7fd51c1fd33d2fd4fae50caa15d029c5b6ade
pdf-font-stream PDF embedded font (sfnt) at offset 0x100E5 5300 bytes
font_01_sfnt_off000112b5.bin
6b020dfc3aff578ca8614aca5db628835de8833c4912c03f2e0ba1681593b0f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x112B5 10652 bytes