Malicious PDF — malware analysis report

Static analysis result for SHA-256 5659970533e3c2f6…

MALICIOUS

PDF

75.1 KB Created: 2021-03-02 18:31:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 751dd40921bc156725ee1f6e61f163a6 SHA-1: d72689ddd77b7618409bd5f5c72a678d605c73e5 SHA-256: 5659970533e3c2f6a70502918ca29d9adebfb38a92af3b83dd67ebcc0973eeb9
136 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to a PDF, combined with heuristics for password-protected archive lures, suggests this document is part of a phishing or malware distribution chain. The embedded URLs are likely used to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wix?keyword=math+in+focus+grade+2+think+central
    • https://cdn.sqhk.co/jigitovewuk/ij9b7if/monkey_s_mask_movie_online.pdf
    • http://marketes.pro/61111551868grtof.pdf
    • https://sudopefizumizer.weebly.com/uploads/1/3/1/3/131383323/5201228.pdf
    • https://xukafubisek.weebly.com/uploads/1/3/4/2/134265855/8521794.pdf
    • http://organize.shop/how_to_change_time_on_acurite_clock7eqj4.pdf
    • http://mowefopovog.mywebcommunity.org/is_road_to_hana_dangerous_reddit.pdf
    • http://xufamorazogubov.sportsontheweb.net/7_years_lyrics.pdf
    • http://wumomotetidofe.getenjoyment.net/9146127351.pdf
    • https://vawuzusafut.weebly.com/uploads/1/3/4/8/134863851/burapezuno.pdf
    • https://cdn.sqhk.co/wozejodes/8Cjijcn/91328794812.pdf
    • http://riniwodifole.medianewsonline.com/discuss_the_salient_features_of_romantic_poetry.pdf
    • https://cdn.sqhk.co/kopilixa/jbLhcja/teposemik.pdf
    • https://liberiloro.weebly.com/uploads/1/3/4/5/134589576/tifagarazazom.pdf
    • http://muzoc.xyz/songs_justin_bieberapfei.pdf
    • https://cdn.sqhk.co/vatopibar/cjhhaNM/kung_fu_street_food.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://faxiruvud.myartsonline.com/hairspray_script_mti.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_off0000e80f.bin
0f1341cb0d215776281173fdb01f1154de314466fd9b09b1aa3ff1ecd69cefe5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE80F 5484 bytes
font_01_sfnt_off0000fac1.bin
6d4f87930df169232e2bfd05d142e1d3a361b2682f9afb287660f376574c2a4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 10748 bytes