Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6f99b09fead878…

MALICIOUS

PDF

44.3 KB Created: 2021-05-11 23:32:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a89458b10821427c329328e7496d9557 SHA-1: 4a756916268eb68706a16c0395a492534d91cef7 SHA-256: 3d6f99b09fead8786fe547b46f71a3006094a77e316684ef4fc5c021cc645d8b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "game hacks" and "free generators". The document body and embedded links strongly suggest a phishing or scam attempt to lure users to malicious websites. The presence of multiple redirector links indicates a high likelihood of further malicious activity, such as malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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 https://netcdn.xyz/app/406889139/free-pet-treats-coin-master-game-hack In PDF document text
    • http://arch-centr.ru/images/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/free-roebucks-com_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004628.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4628 24504 bytes
SHA-256: bbdce7312894299e45a5934d9ce78e4c246606d7a2b6afb4a68a3bc4d018b248
font_01_sfnt_off00007e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2B 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000087dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DC 19192 bytes
SHA-256: 63fae37e4ef12e2e2f823b45ae5f6c78a0024d70ce641452c70fae32c7145380

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