Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ad3e0f175ab95e…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 22:55:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a98978e03d763d59eb7e72fa8283b2b7 SHA-1: 5e99d34536d56022777924d7f255c0d9b1956e4f SHA-256: 70ad3e0f175ab95e7aa87998659e2b397fc81e587cbb70a3e6a091ffe887e94d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/mcpe-master-hack-unlimited-coins-latest-version-game-hack In PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/robux-cheat-android_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/tiktok-free-edits_GM835599320.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-in-one-second_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-how-to-get-free-pet_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/i-know-who-hacked-my-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-free-online_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-promo-hack-code_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-hack-generator-tool_GM406889139.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_002_off00003238.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3238 23076 bytes
SHA-256: fad7ba1a8bcfe2f6cb4a146a0533181abbf260cdf445a48c778480b02394a5f9
font_01_sfnt_off000065f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F7 19008 bytes
SHA-256: 9c09571335a502a0cd86718b4a7dcac7efdf37c0d727a62b975ff4a707afefa7

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