Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0a4ce9ec6ecd0b…

MALICIOUS

PDF

35.5 KB Created: 2021-07-09 02:05:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d6a4ec8fb71889801b10354448b0358d SHA-1: 1669b9e2d6ad525fb82fcc46638b63ded246414a SHA-256: 1f0a4ce9ec6ecd0bf276c630b81bef0c70cd97ab70e4a494827dd202901b22fe
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'robux' generators. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-hack-mod-apk-free-download-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://netcdn.tw/app/406889139/coin-master-hack-mod-apk-free-download-game-hack In PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-download-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-hack-somebodys-roblox-account_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-use-cheat-engine-on-roblox-winter-crisis_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-lots-of-robux_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-get-1-million-robux-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/pastebin-free-robux-hack-no-wait_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/jailbreak-hack-download-roblox_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/easiest-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-recording-roblox-software_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/roblox-new-lighting-gmae-free_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-group-roblox_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32BC 22928 bytes
SHA-256: 6bfe78dbe28149bff413d7ebc5c7e0bc82d2e6d9167c372360d38bb287915062
font_01_sfnt_off0000664a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664A 18924 bytes
SHA-256: 6f4418fdf2b7e63a54348beb1bcc63faaf8dd422a5e9a8e1d4e79ebabab3b494

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