Malicious PDF — malware analysis report

Static analysis result for SHA-256 167f219d550bbe1d…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 09:04:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c589601c6a500c35b9f5e3747a0df904 SHA-1: cad9b893d566929bfedf1e5a007229cf950718ae SHA-256: 167f219d550bbe1d127550004876607fd61057a0736768a4951d91c342a8455a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The document body and heuristics indicate a clear intent to trick users into visiting these malicious URLs, likely as a lure for further exploitation or malware delivery. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-free-spins-2021-link-game-hack In PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-116-free_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-executor-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5143 23896 bytes
SHA-256: 78bb1e68a76c5daac731b05320819b267c32506d32c4ddab1f5eeb444e3cb677
font_01_sfnt_off00008770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8770 18456 bytes
SHA-256: 5e2cbe9c2ae96aee1fd98235dd9317329c03050a53478c0c3dce2773c7c80deb

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