Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae427cbd0343ee54…

MALICIOUS

PDF

74.9 KB Created: 2021-01-18 18:22:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: acd1192dc806b411034a68d74f1d6f91 SHA-1: 2ab4249a600012bb94abb0d165dcf2f951107798 SHA-256: ae427cbd0343ee54c13eb85328d0b7cf6f4a0ca6df1d7631f07038c4da75d758
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 URL that mimics a search result for a game download, likely a lure to trick users into downloading a malicious file. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to facilitate the download of a secondary payload.

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://seumenha.ru/wb?keyword=brick%20building%20game%20free%20download PDF link annotation
    • https://site-1201322.mozfiles.com/files/1201322/blockchain_bitcoin_wallet_apk_download.pdfIn PDF document text
    • http://jofarofuwudeveb.66ghz.com/install_google_sheets_on_mac.pdfIn PDF document text
    • https://site-1177773.mozfiles.com/files/1177773/activity_launcher_apk.pdfIn PDF document text
    • http://jojiluvapesoj.22web.org/bodybuilding_vector_free.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/votawawo/wigapazukobudepibajupo.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/levabumitetulu.pdfIn PDF document text
    • http://mavoweba.epizy.com/96386236973.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/bigijokefi.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/zaworizeginisepawobug.pdfIn PDF document text
    • http://goduzidexemave.epizy.com/philips_air_fryer_hd9216_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/my_hero_academia_3_dubbed_free.pdfIn PDF document text
    • http://zawagebojirowe.rf.gd/loxepij.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/dajumuxopudaruxile.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/different_moonkin_forms_bfa.pdfIn PDF document text
    • http://gejujebiwibi.epizy.com/ruramamamaleb.pdfIn PDF document text
    • http://ruxuvejefo.epizy.com/59093049352.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_off0000e777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE777 5508 bytes
SHA-256: 7ea032b50b1a80ae20a95b3d122de1e4871d7fe57c1394bae621aa095b5dfa2f
font_01_sfnt_off0000fa36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA36 10932 bytes
SHA-256: 0ef3173272795c15e39329625718614e4b326417d2166341bb4a5b4adfdab6ef

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