Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef21ef588a97025…

MALICIOUS

PDF

90.1 KB Created: 2021-03-28 12:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c58aca096c94b32669393d6294c23c7 SHA-1: d981eb15c0a0ccf6c64e4c084b0da10807a6ea1c SHA-256: 9ef21ef588a97025a56b09b9d8e44abefd6a0fe48bf4479071c9e8ce9010b6e2
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://ponafet.ru/award?keyword=antiasthmatic+drugs+classification+pdf, is presented in a context that suggests a phishing or social engineering lure, disguised as a document about drug classification. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ponafet.ru/award?keyword=antiasthmatic+drugs+classification+pdf
    • https://cdn-cms.f-static.net/uploads/4454040/normal_6049542226f83.pdf
    • http://jarokixepoweso.mypressonline.com/45591166766.pdf
    • http://betuvunexe.22web.org/kevulu.pdf
    • https://static.s123-cdn-static.com/uploads/4468537/normal_5fde601b36383.pdf
    • http://vomimaforotagi.mywebcommunity.org/cyberpunk_2077_ps4_pro_performance_update.pdf
    • http://moxumepavigotuf.iblogger.org/wivelovuxuk.pdf
    • https://cdn-cms.f-static.net/uploads/4454043/normal_5fd85f86a11ec.pdf
    • http://jamotovoxut.mywebcommunity.org/dokumen_akreditasi_puskesmas.pdf
    • http://fastcreditcheck.info/49758259343j25kw.pdf
    • http://namivuwefixixow.22web.org/download_campus_toeic.pdf
    • http://garantiya62.ru/dell_optiplex_760_drivers_for_windows_10_32_bittdcjg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/251dcbf5-ec54-46bb-b32f-5544c30df265/tuwalubapadebedumenixego.pdf
    • http://xenavak.rf.gd/norapupilumukosoneri.pdf
    • https://uploads.strikinglycdn.com/files/794be80d-887f-496d-a986-0adcbcc39ef9/guitar_chords_chart_for_beginners_printable.pdf
    • https://uploads.strikinglycdn.com/files/9002e128-9fac-435b-9564-7a851cc898dc/mijapigejozedezosetasam.pdf
    • http://tuminexozuvino.atwebpages.com/96118520039.pdf
    • http://bivoxubi.epizy.com/40925729748.pdf
    • https://uploads.strikinglycdn.com/files/d5d814db-7f87-44e1-bc49-c392b79044b9/what_is_the_effect_of_recording_a_warranty_deed.pdf
    • http://xilagerezob.epizy.com/wukevujojulezekefomegik.pdf
    • http://letituxis.epizy.com/chalice_rune_guide_destiny_2.pdf
    • https://uploads.strikinglycdn.com/files/86b66ed5-89b7-4876-8c97-d64476f0dce3/39971052020.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_off00012223.bin
5dd3cd8228a37351f9ef1fa01d4108873ec076d7833c7be3bf56be46cd86b0e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12223 5556 bytes
font_01_sfnt_off000134e1.bin
be97e0e70dc5d29cc562f27b9d093a5ed6bbd9f70648e442e262ac6166de9d67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134E1 10956 bytes

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