Malicious PDF — malware analysis report

Static analysis result for SHA-256 35377aea6a5f1cde…

MALICIOUS

PDF

76.7 KB Created: 2021-03-06 07:33:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 185106b234a26d0843edd7613a25f500 SHA-1: d7350fc4687d967c3c7426b7d5395db4d24c0ed2 SHA-256: 35377aea6a5f1cdec0f270e7f49d47e40cb6520476853d233f681924e54ad076
96 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body is heavily obfuscated, suggesting an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/aws?utm_term=hdhomerun+prime+6+plex
    • http://wadopipojadali.iblogger.org/13938198191.pdf
    • http://kerutugizuxig.mygamesonline.org/firinuv.pdf
    • http://zupuvotan.22web.org/ziruru.pdf
    • http://xepuxesadara.mypressonline.com/83774115645.pdf
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/8393455.pdf
    • https://nuzukozifazo.weebly.com/uploads/1/3/2/6/132682871/xuverukijup_katetab_lofudujarufo.pdf
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/3402539.pdf
    • http://kafalukuwemi.mygamesonline.org/17305376059.pdf
    • http://nupubidodeje.22web.org/how_to_root_kindle_fire_hd_6_4th_generation.pdf
    • http://wulutano.mywebcommunity.org/89791411710.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pujusojup.epizy.com/electronically_sign_online_free.pdf
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_87eb911bc9544cf7b8c2014bf88b6655.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5d05c4dd-c639-4b62-96ea-c2f770d3fdf6/zobumarusetuzifujevogivak.pdf
    • http://besipopi.epizy.com/setiwunotuvalolaseva.pdf
    • https://uploads.strikinglycdn.com/files/e7f5599b-3d44-4efe-842a-f4ad64273b51/weather_worksheet_for_3rd_grade.pdf
    • https://729282ec-1290-4cbc-9302-cf8a24acd4c7.filesusr.com/ugd/42c189_8b1f736573f043ad9c7cc96d18f248b6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7f22d083-5867-43b4-b60b-904ef0503ed1/xabizadinanagozikopo.pdf
    • https://uploads.strikinglycdn.com/files/4b3894b7-b307-4739-ac9d-649b47799ade/90485465521.pdf
    • https://uploads.strikinglycdn.com/files/713e8a4c-932a-4fdf-8c16-2f3b69d2c3d9/19319248227.pdf
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_a34b6b6353f04d59b742ca80a154b0db.pdf?index=true
    • http://kixixiwibatogit.epizy.com/foxatajozatuv.pdf
    • http://watenuzigoxabi.rf.gd/marksheet_up_board_2016.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_off0000ef42.bin
f7434648019a23a37ceab2466496aa548074ec6402e487c017fea32de5aa9158		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF42 4996 bytes
font_01_sfnt_off00010015.bin
e898250a3c0834a2e78921f5e7d6a7930f2c7ec7e307e6159f17f273739d4e1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10015 10884 bytes

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