Malicious PDF — malware analysis report

Static analysis result for SHA-256 1384fe01bf36c883…

MALICIOUS

PDF

77.5 KB Created: 2021-03-11 06:06:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7db9ddb6aab3ce3b438bbc196468006 SHA-1: bd2a742b019d4f0f5fb04957f2e11dd3d546f7a5 SHA-256: 1384fe01bf36c883dc9a534c3f2859d319ce8382c82062db458b4a1ddd4b2046
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to educational material, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/wix?keyword=cellular+respiration+summary+worksheet+answers
    • http://tideparipawovu.mygamesonline.org/old_bridge_high_school_calendar_2021.pdf
    • https://cdn.sqhk.co/gegojagakexu/fMhjbNk/stamp_duty_land_tax_return_guide.pdf
    • https://botapafejerevim.weebly.com/uploads/1/3/5/3/135317081/6941165.pdf
    • http://coolmag.biz/waxederenedezito9owyh.pdf
    • http://armada.technology/46392576368eu3io.pdf
    • http://nanebaxexob.getenjoyment.net/68692804487.pdf
    • http://tekaxaxiwirika.iblogger.org/sword_art_online_progressive_manga_volume_7.pdf
    • https://vevorusafe.weebly.com/uploads/1/3/4/5/134516648/57046fc790cef.pdf
    • http://gerisekazaleg.22web.org/laminate_sheet_countertop_installation.pdf
    • http://natnat.fun/sprouts_wild_rice_blend_cooking_instructionsfj8k3.pdf
    • https://cdn.sqhk.co/sawijewabob/jjhbghR/migajufiwigegukuseloxo.pdf
    • http://domsale.xyz/athelia_rolfsiiyipoq.pdf
    • https://gavanigo.weebly.com/uploads/1/3/1/3/131380609/798accbf23.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nidawijonag.rf.gd/widadidopigalunak.pdf
    • http://minuwugonobusuw.epizy.com/45681759379.pdf
    • http://pujusojup.epizy.com/excel_macro_list_all_sheets_in_workbook.pdf
    • http://rakemexovujepez.epizy.com/pivovofavopixajufol.pdf
    • http://pizomapivume.epizy.com/why_you_always_in_the_mood_song_lyrics.pdf
    • http://kigajorujotek.rf.gd/dedenazox.pdf
    • http://juwovumul.rf.gd/definition_of_mitochondria.pdf
    • http://fosadexovoz.epizy.com/designer_bedsheet_by_rohit_bal.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_off0000e584.bin
4b0aff63423c99a8eede6b22cd7cfe92b9eabe14128e9781c145f70a0eba0819		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE584 5220 bytes
font_01_sfnt_off0000f72b.bin
f0ded3d36575e6342d8ebce9542e8623f38cfa24db90fc32a61632f192f2ceee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF72B 10288 bytes
font_02_sfnt_off00011a69.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A69 4324 bytes

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