Malicious PDF — malware analysis report

Static analysis result for SHA-256 0775e23b0dfb2ba6…

MALICIOUS

PDF

45.1 KB Created: 2021-06-07 21:23:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8a59ae53aab07ad20680924e1e1e5a51 SHA-1: dd878b1675e9c43097cd31ccc028c14a2e927750 SHA-256: 0775e23b0dfb2ba6679ce9a5caf6659ef418424b27d54b818a706093cbfb08a6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures related to game hacks and free currency, such as Robux. The document body, though heavily obfuscated, contains references to these lures and the primary malicious URL. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves tricking users into clicking malicious links that likely lead to further malicious content or malware downloads.

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.tw/app/431946152/robux-hack-no-buying-apps-game-hack In PDF document text
    • http://inextpresident.com/images/tiktok-vs-free-fire_GM835599320.pdfIn PDF document text
    • http://inextpresident.com/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/roblox-latest-hack_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/is-roblox-free-on-the-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/coin-master_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://inextpresident.com/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://inextpresident.com/images/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://inextpresident.com/images/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • http://inextpresident.com/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://inextpresident.com/images/free-minecraft-survival-server_GM479516143.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
stream_004_off00004ede.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EDE 26648 bytes
SHA-256: 0fbc33e28b4c27d58f810f3e186afdd1978dbd5d9fe1b9ba9f961db5842843ca
font_01_sfnt_off00008b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B3C 19012 bytes
SHA-256: ae3eccf1fc5e9bc94794782703d9824981807f8cc4adf52bc748f122c9cd284d

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