Malicious PDF — malware analysis report

Static analysis result for SHA-256 54eee3e82226cb94…

MALICIOUS

PDF

80.9 KB Created: 2021-03-28 10:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d325822b50ac15b3f28dc6834a3223c4 SHA-1: 450319cdab71272e87d9a6d50f38f53de571c32d SHA-256: 54eee3e82226cb9403fe28f1af9e7a07cf9dab16aed18ca260ab892acd0024da
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file. The document body, though heavily obfuscated, appears to contain keywords related to medical procedures, likely as a lure.

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/award?keyword=septoplastia+endoscopica+pdf
    • https://static.s123-cdn-static.com/uploads/4478415/normal_5ff0436486651.pdf
    • http://fruittea.space/acordes_en_guitarra_de_la_cancion_ya_no_eres_pan_y_vino_letra1dm3z.pdf
    • http://pestore.pro/fts_test_answer_key_petq7xk0.pdf
    • https://cdn-cms.f-static.net/uploads/4451566/normal_600e59984a3d5.pdf
    • http://arevakar-travel.com/38667826959f48c.pdf
    • http://tedurelaseji.mygamesonline.org/regiwifora.pdf
    • http://dutov.org/xibowilusigazafpu26.pdf
    • http://worozoxiw.sportsontheweb.net/beginner_workout_plan.pdf
    • http://vizionsmc.net/soguxadekr03yo.pdf
    • http://digtalcaliper09.xyz/how_to_use_the_hoover_max_extract_carpet_cleanerbhw5s.pdf
    • http://vomamafawib.scienceontheweb.net/80301091925.pdf
    • http://rubewox.sportsontheweb.net/one_touch_ultra_reset_memory.pdf
    • http://kiparegazeratax.getenjoyment.net/all_command_prompt_commands_windows_10.pdf
    • https://cdn-cms.f-static.net/uploads/4454048/normal_60156202d4ac1.pdf
    • http://mmmuuuue.space/388538564988crj5.pdf
    • http://noxavikadovul.mypressonline.com/xepivexokolito.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zilisidojaze.myartsonline.com/gunor.pdf
    • https://s3.amazonaws.com/rumezo/33147100083.pdf
    • https://s3.amazonaws.com/latufenaw/second_class_citizen_emecheta_sparknotes.pdf
    • https://s3.amazonaws.com/kitakilesa/autodesk_maya_2018_software.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef6c.bin
f132b4b4063685cc58d58e4084bc8c70e6d5165113ece0590a9deec6e1731efa
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6C 4944 bytes
font_01_sfnt_off00010043.bin
0edbe8c71a61380de7825783bbc408b65e9ca6fcec294016500739ffdd6d1929
pdf-font-stream PDF embedded font (sfnt) at offset 0x10043 12748 bytes
font_02_sfnt_off000126df.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x126DF 4324 bytes