Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e7b8e2814700c9…

MALICIOUS

PDF

35.6 KB Created: 2021-07-09 14:37:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cc0d3020cefe92560ee76eb1ffb95702 SHA-1: 2b198662b04683ef3129f105e769db37894ad38e SHA-256: 58e7b8e2814700c99c9ed9dd19279f22db9c3d012d7e0209fa780642f3a73e3c
142 Risk Score

Malware Insights

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

The PDF document employs a lure related to obtaining free game items and hacks, as indicated by the document body and heuristic firings. It contains numerous external links, with a primary URL pointing to a 'game hack' redirector and others leading to a large collection of PDF files hosted on a separate domain, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of external links aligns with techniques used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-get-minecraft-java-edition-for-free-game-hack PDF link annotation
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/redwood-prison-roblox-all-gamepasses-hack_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-how-to-get-the-free-trial-trial-bc_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-game-points-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/get-robux-today_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/get-free-get-lol-roblox-shirt_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-gun-sceipt-hack_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/how-to-get-free-robux-fake-card_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://www.hiddencanyonbejiguwang.com/assets/CKImages/files/roblox-get-anything-for-free_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_off0000351c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x351C 22784 bytes
SHA-256: 90d54bd49f0c0ade4dd8c9b8b17c1876419bea1cf6d40b103d3f1eee01f8116f
font_01_sfnt_off00006793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6793 18616 bytes
SHA-256: 898c1194d8bc2e07c8eea0e55d341ba96b7c540544d1d7788b8098c3180d6029

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