Malicious PDF — malware analysis report

Static analysis result for SHA-256 7704a6ccd2f8861f…

MALICIOUS

PDF

46.3 KB Created: 2021-06-07 04:02:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2a30d66056429afc0d85f21328d52ee3 SHA-1: 66ac9d4845a24b8e70b4235b6ebc2fa45207db42 SHA-256: 7704a6ccd2f8861f07fa26013877fe5f2fc0c1606f92995a5c115254506be13b
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to malicious redirectors, masquerading as game hacks and impersonating Microsoft to lure users. The primary link, https://netcdn.tw/app/431946152/hack-roblox-lumber-tycoon-2-btools-game-hack, is identified as a malicious redirector. The document body, though partially corrupted, contains references to game hacks and URLs that further support the phishing and redirection attack pattern. No scripts were extracted, but the presence of malicious links and the brand impersonation strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/hack-roblox-lumber-tycoon-2-btools-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/hack-roblox-lumber-tycoon-2-btools-game-hack In PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/wurst-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/master-coin-free_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/grief-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-coins-coin-master-hack_GM406889139.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_off000050e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E3 27420 bytes
SHA-256: d85d0710deba05662b02b59be9bba704f5d9f85b23a2abb2ca9d62c127034fa5
font_01_sfnt_off0000902d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x902D 18988 bytes
SHA-256: 3be8813a19f3f503d164dc2a3222ddf2ca2bcabdfc47891f95239a33cedd5c0e

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