Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c50604e9fa9845…

MALICIOUS

PDF

79.2 KB Created: 2021-03-10 13:57:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e09e32638f3f9f8ec71972ca2a548228 SHA-1: e09bfc83d1db2bdc52f79a3aad40f0645304a915 SHA-256: 10c50604e9fa98455cc78e413414f546006edef80e0dc071d5a51975d19967fd
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 URL that directs users to a suspicious domain, likely as part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'the nutcracker piano pdf'.

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://botokaw.ru/award?keyword=the+nutcracker+piano+pdf
    • https://static.s123-cdn-static.com/uploads/4454547/normal_5fde71c22b2cb.pdf
    • https://static.s123-cdn-static.com/uploads/4470982/normal_5ff65b5e1fe24.pdf
    • https://static.s123-cdn-static.com/uploads/4473632/normal_60063cdbd65d3.pdf
    • https://cdn.sqhk.co/bagadogod/EXg1dhf/allegiant_air_flights_to_las_vegas_nevada.pdf
    • https://cdn.sqhk.co/pigajifaw/aWxhghf/galactic_empire_symbol.pdf
    • https://cdn.sqhk.co/kulobuwaxegu/jhifgiC/jopufadudirode.pdf
    • https://cdn.sqhk.co/godezixibufo/id5ggsP/79743736259.pdf
    • https://cdn.sqhk.co/xafogatok/80MheD6/vaxisarajizizakivoku.pdf
    • https://cdn-cms.f-static.net/uploads/4460463/normal_60158751a0796.pdf
    • https://static.s123-cdn-static.com/uploads/4479435/normal_5fede9d946b6e.pdf
    • https://cdn.sqhk.co/rovujesox/jgBjbhj/idle_theme_park_tycoon_aqua_park_slow.pdf
    • https://cdn.sqhk.co/burexewejam/idgRicO/cytus_2_apk_full_unlocked_latest_version.pdf
    • https://cdn.sqhk.co/sowumavag/jigciaV/white_ombre_nails_with_diamonds.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fedure/rovebeguwetek.pdf
    • http://zudujijikaj.rf.gd/busogamuvegepedixop.pdf
    • https://s3.amazonaws.com/lixuzo/61522723974.pdf
    • https://uploads.strikinglycdn.com/files/39ab32ae-f4ab-4d8c-b36d-37bcf9c198a4/71848608552.pdf
    • https://uploads.strikinglycdn.com/files/0e25da86-5766-49a5-b5b3-cdccafc99624/nuxutijebezijuk.pdf
    • https://s3.amazonaws.com/jobavo/report_illegal_dumping_canberra.pdf
    • http://sujetokotew.rf.gd/asus_zenfone_ar_android_9.pdf
    • https://s3.amazonaws.com/rovikibixu/kuvubofasinozolasaxu.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_off0000f9eb.bin
24e93737950d641d05e48274710f570945e6c05b7b3ed2c4e53d7158e798c994
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 5048 bytes
font_01_sfnt_off00010b16.bin
f4832b5c2b120d58f1e328296e902a67dc10a17cd85a5e6728c291e64a999fab
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B16 10608 bytes