Malicious PDF — malware analysis report

Static analysis result for SHA-256 22441d6c85625353…

MALICIOUS

PDF

42.5 KB Created: 2021-05-19 10:43:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2aa20bab3874b8bd2451dc98be1c0c1d SHA-1: 246122f37cc525b8e9e44f1f528b902ee2567095 SHA-256: 22441d6c856253539de41b79007d135a697993dd25f49972a2180d71cf4aea62
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://netcdn.xyz/app/406889139/how-to-get-free-spins-and-coins-on-coin-master-game-hack PDF link annotation
    • http://galletta.com/images/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • http://galletta.com/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://galletta.com/images/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://galletta.com/images/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://galletta.com/images/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://galletta.com/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://galletta.com/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://galletta.com/images/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://galletta.com/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://galletta.com/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://galletta.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://galletta.com/images/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://galletta.com/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://galletta.com/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://galletta.com/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://galletta.com/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://galletta.com/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://galletta.com/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://galletta.com/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://galletta.com/images/giftrobux-com-generator_GM431946152.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_003_off000047f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F4 26152 bytes
SHA-256: 2db02bda35ff1a98ecfeda76e888270aa62ff03cace0bd2f05b3c5f822a41701
font_01_sfnt_off000083d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D9 18224 bytes
SHA-256: c3eeb8e5bbecb0a66d0dccf890560b2772aaf25cfcf2943a976e8e45774626aa

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