Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31d279d4dd17ead…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 23:07:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a5ff37d98c866e0a48bb6196d525f3ae SHA-1: a3f45fc7d4daeaa06c812593de8294824dcd28b9 SHA-256: f31d279d4dd17ead6d609f097822d878473239517acf4cb7280480c0f457f9e9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as 'game hacks' or 'free generators' to entice users. The primary lure URL is http://netcdn.tw/app/835599320/how-to-get-tiktok-famous-for-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

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/835599320/how-to-get-tiktok-famous-for-free-game-hack In PDF document text
    • https://www.xenonsvjetla.com/files/do-you-get-free-robux-builders-club-on-the-weekend_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/ho9w-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/pokemon-go-free-zangoose_GM1094591345.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/roblox-place-copy-hack_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/roblox-money-cheats-xbox-one_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-redeem-code-roblox_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-generator-no-verification_GM431946152.pdfIn 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
font_00_sfnt_off00002ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA2 22764 bytes
SHA-256: 1173901f31a15f0a2b7cde97bdf50d9783c978f415bf62ed016ea768b13441b1
font_01_sfnt_off0000618c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618C 18536 bytes
SHA-256: bb1c92c15c6f7e928bb0bf9e48269c0987e64c88e905b9eb553ca97d913e1119

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