Malicious PDF — malware analysis report

Static analysis result for SHA-256 c375d8792a7465a4…

MALICIOUS

PDF

69.0 KB Created: 2021-02-22 01:10:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fbe380cf421976a8913a962847efe955 SHA-1: 5ef76b3064d620f60a415fc2daebca684c20a6f5 SHA-256: c375d8792a7465a41b677107f08b24db04bcd8565c6878c0c80cf12c46657887
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though partially garbled, suggests a lure related to 'howl's moving castle piano sheet music advanced', which is likely a pretext to drive traffic to the provided URL.

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://leonvi.ru/wb?keyword=howl PDF link annotation
    • https://cdn.sqhk.co/fugolamudara/fiaIohc/25563760163.pdfIn PDF document text
    • http://nexekuwa.22web.org/melefuti.pdfIn PDF document text
    • http://oneitshop.info/fupobobawixusof05rv1.pdfIn PDF document text
    • http://lobarularexe.iblogger.org/moposetuvedofenumuzuze.pdfIn PDF document text
    • http://yewes.space/weathermaker_8000_codesrq73n.pdfIn PDF document text
    • http://italystore.pro/labewinizojimiapg6l.pdfIn PDF document text
    • https://cdn.sqhk.co/buvovemif/hWhc2kZ/heart_appendage_occlusion.pdfIn PDF document text
    • http://shoop-fh.ru/madhya_pradesh_weather_report_todays72z4.pdfIn PDF document text
    • http://dkblogin-de.best/fawatamajiratedojoti8kgdu.pdfIn PDF document text
    • http://storezone.info/5700270643682wgi.pdfIn PDF document text
    • http://ital-girl.space/bakov580xt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/barchart_mpchart_android.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/swiftkey_apk_kitkat.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/diary_of_wimpy_kid_movie_common_sense_media.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/baahubali_1_movie_songs_song.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEB 5540 bytes
SHA-256: a43be89c01a31836f63b7b33bb18951fa200f55c6864d3195fe9a640c1b2f86d
font_01_sfnt_off0000ddbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBD 12780 bytes
SHA-256: 0e9a02127bcb446ed6ed15c48a8160f9af4b691645316a709676a0ff962907ee