Malicious PDF — malware analysis report

Static analysis result for SHA-256 75905442ea67afd8…

MALICIOUS

PDF

73.8 KB Created: 2021-03-29 10:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d150af018a2f3ff9b294340d4a7da870 SHA-1: a38fc58436230915080114420452aba4efce5ece SHA-256: 75905442ea67afd836be28040c7c32b938333bcd2342b084c1c8f2e5bf285b3a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, suggests a lure related to chapter answers. The embedded URL points to a suspicious domain, likely serving a malicious payload or phishing content.

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://resalured.ru/wix?keyword=capitulo+4a+adonde+vas+answers
    • http://podjem2.club/nabuzajogunazi73mu2.pdf
    • http://dvigatel.guru/96415502279y8rnf.pdf
    • http://bbbbbbbbeeee.space/vafokoxuxopeluxus6ma1.pdf
    • http://odemebayisitrafik.com/how_to_do_congruent_triangle_proofst10f6.pdf
    • http://center-about.com/what_is_the_omnibus_reconciliation_act_of_1980s95lp.pdf
    • http://genusadnlo.space/perforated_sheet_metal_suppliers_ukj7z29.pdf
    • https://cdn-cms.f-static.net/uploads/4405644/normal_5fdbfa8b1dee6.pdf
    • https://cdn-cms.f-static.net/uploads/4465565/normal_5fd23ebac8902.pdf
    • http://chunyoo.com/vijonorrs1h7.pdf
    • https://static.s123-cdn-static.com/uploads/4383322/normal_5ffb8ca6ea3a5.pdf
    • http://meblik.su/how_to_put_together_graco_duetconnect_lxb28pm.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/niwotipugonuvoz/girariwex.pdf
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_bd3d1bf7168148c09d4ae2dc82dfc3fa.pdf?index=true
    • https://s3.amazonaws.com/sabegokek/dls_unlimited_coins_profile._dat.pdf
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_c5eeec070f98401293f4e7ad6c188190.pdf?index=true
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_e694883b475f4e059aab1b6c99119f88.pdf?index=true
    • https://c1f973cf-d719-4acb-8f9e-cd83ae4fb94d.filesusr.com/ugd/057766_2621a0c2e2d44a3ca2d6426ed97a20b5.pdf?index=true
    • https://efec373b-cb85-4617-95c0-ca1809d574ea.filesusr.com/ugd/9529b1_918cb71491ed4497ac3cf04029029657.pdf?index=true
    • 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_off0000d72d.bin
b00ecd19090880924020417d584841e792181d3f8e6e7223e17d4fa9026fc8a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xD72D 1560 bytes
font_01_sfnt_off0000df1d.bin
d05559717c464e3f8e3ad816806aa8609c0a6bb92959cdaace29d74224049e63
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1D 5100 bytes
font_02_sfnt_off0000f098.bin
31e230c989ac0b82b8bdec86fa9a207f499e69bc6fd2d01054fb1a4818394419
pdf-font-stream PDF embedded font (sfnt) at offset 0xF098 11924 bytes