Malicious PDF — malware analysis report

Static analysis result for SHA-256 25113ec2a8fa4fca…

MALICIOUS

PDF

36.5 KB Created: 2021-07-05 05:46:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 35fb5cb4d2562527e1aafa2927ae08b1 SHA-1: f7fe7325b72a87ff3fe88fa2c19d57193f92f687 SHA-256: 25113ec2a8fa4fca892e6cfe978e09ec4f165d909bcd79708263d203aba05863
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure is a link to 'free generator / game hack' content, which is a common social engineering tactic to trick users into downloading malware or visiting malicious sites. No scripts were extracted, but the embedded URLs and PDF heuristics strongly indicate a phishing or redirection attack.

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/479516143/minecraft-pe-016-0-apk-download-free-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-cheat-engine-speed-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-roblox-jailbreak-xbox-one_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/cheat-engine-cracked-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/tix-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/1-robux-every-second-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-grouup-bots_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-rare-hats-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/new-roblox-aimbot-hack-exploit-strucid_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-money-generator_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-avatar-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-command_GM431946152.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_off000035b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35B0 22696 bytes
SHA-256: 695f540d551dce3ac4f313107eb2e91cc6b0731b9917c929655a8cba4b4cfbac
font_01_sfnt_off00006867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6867 19524 bytes
SHA-256: 2c1b2724e9f8d24eaf424e37f542e22724de6abfb49ca65165bfe174736ddb84

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