Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48c612c353b5767…

MALICIOUS

PDF

43.7 KB Created: 2021-06-11 05:07:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ad34f460e8e218e1737f3aa0a77e385c SHA-1: 9a50c85089acadb5f3437e7abff6c332229285f8 SHA-256: d48c612c353b5767863e1de8fdc1373535ee9bc101621ef81993c9eba8510f3b
200 Risk Score

Malware Insights

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

This PDF document impersonates PayPal to lure users into downloading a 'game hack' or 'generator'. It contains multiple links to malicious redirectors, including one at `https://netcdn.tw/app/431946152/raindrop-hack-roblox-download-game-hack`. The document body and embedded links suggest a phishing or scam campaign aimed at tricking users into visiting potentially harmful sites or downloading malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/raindrop-hack-roblox-download-game-hack.
  • 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/raindrop-hack-roblox-download-game-hack In PDF document text
    • http://ines.co.rs/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/100-free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-admin-hack-adopt-and-raise-a-cute-kid_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-rixty-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-one-piece-pirates-wrath-hacks_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/tiktok-free-like-and-views_GM835599320.pdfIn PDF document text
    • http://ines.co.rs/images/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/download-roblox-hack-robux_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://www.roblox.coIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DCA 24432 bytes
SHA-256: 896748cace1af6227e6672d479b1cd37b2d34957b74b3fe5ae3b3fd0409985f4
font_01_sfnt_off000085e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E3 18984 bytes
SHA-256: d2f2ba573f53de98d10eba6e95a6a4261e97677fb5cc59e1c73e4c89fdff7ab7

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