Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d075eb7c12fcc60…

MALICIOUS

PDF

44.6 KB Created: 2021-06-10 19:24:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c23cdd081f5b1ee0d22bf6eb5d9a06db SHA-1: 4a352b4646fca3074c649d457e5bd13661214cb0 SHA-256: 0d075eb7c12fcc6030e61e02e75b4ea63d465fe3479c57643f980e6b55dcd58b
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1534 Internal Spearphishing

This PDF document employs a lure related to game hacks and generators, impersonating brands like Netflix to trick users into clicking malicious links. The embedded links, such as 'https://netcdn.tw/app/431946152/how-to-hack-someones-character-in-roblox-game-hack', are known to lead to credential phishing or further malicious content. The document's structure and heuristics strongly indicate a phishing or malware distribution campaign.

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/how-to-hack-someones-character-in-roblox-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/how-to-hack-someones-character-in-roblox-game-hack In PDF document text
    • http://oca.undil.tl/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-admin-roblox-gane_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-instantly-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/robux-redeem_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/optifine-pe_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-bedrock-client_GM479516143.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
stream_004_off00005054.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5054 25476 bytes
SHA-256: 5911a63f7d6a84a0af11d3547dca2a9be5b9d8e3420c1306e6b8b5eeac7147df
font_01_sfnt_off000089e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E6 18876 bytes
SHA-256: 87f7068c0324a4ce441ae144472fe54ed2717eb99fc9d0f95e213aaefb0294cb

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