Malicious PDF — malware analysis report

Static analysis result for SHA-256 c88f963f207c7dbc…

MALICIOUS

PDF

76.5 KB Created: 2021-04-07 21:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea4fcdd51ef46f1bddb566f0bf4fcd2a SHA-1: 8577c8375aa0e48a1de9cf002e3bfe806d860112 SHA-256: c88f963f207c7dbc26269852f58d842aad3cb933ae28ee617a1a6137093bc5fe
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that, when clicked, likely leads to the download of a malicious payload. The document body, though heavily obfuscated, suggests a lure related to 'sheet music pdf', further supporting a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/wix?keyword=go+down+moses+sheet+music+pdf
    • https://mipukijomov.weebly.com/uploads/1/3/4/7/134768852/8569330.pdf
    • https://cdn.sqhk.co/tozakexidupe/iwXjanp/16796284733.pdf
    • https://buzazimuz.weebly.com/uploads/1/3/2/3/132302772/foramoweji.pdf
    • http://tevfikyuce.xyz/wupazogabibizixuxes7cwm0.pdf
    • https://cdn.sqhk.co/tajugajobib/jj1ijqL/rexigek.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • https://cdn.sqhk.co/pategazikiw/agfRxhe/screen_recorder_software_free_download.pdf
    • https://cdn.sqhk.co/gukituzaju/fhcjahb/vitamix_a3500_deals.pdf
    • https://nebakeji.weebly.com/uploads/1/3/4/6/134649015/zazizuposekomexivig.pdf
    • http://nariwunuzaw.scienceontheweb.net/balaji_organic_chemistry_for_neet.pdf
    • https://zelubofiwexuf.weebly.com/uploads/1/3/4/2/134234915/dc57105.pdf
    • http://cz-nitrof.website/34046253062se7sa.pdf
    • https://cdn.sqhk.co/ninevowa/ifzHSgd/cambridge_oxford_dictionary_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sumesawoxajew/odia_bhajan_dj_song_2019_mp4.pdf
    • http://tijepexaran.epizy.com/grief_and_loss_worksheets_for_adults.pdf
    • http://mezexefobotero.epizy.com/burglar_bill.pdf
    • http://lojubefogugiku.onlinewebshop.net/peguzefasar.pdf
    • http://jitumevadegoz.rf.gd/72128513896.pdf
    • https://s3.amazonaws.com/zulezov/how_do_i_set_my_canon_printer_to_airprint.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_off0000e10c.bin
dc241af876a00c76d85e0e4efb122ec871c400b4b71d41bcd5a04c5b828f2564
pdf-font-stream PDF embedded font (sfnt) at offset 0xE10C 5060 bytes
font_01_sfnt_off0000f236.bin
6f34b8b4c89205e1b5c25f34aa988e949cacd5aa2a2f4e7c3ebec8f71876c86f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF236 10648 bytes
font_02_sfnt_off000116a3.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x116A3 4324 bytes