Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b023587bf08447c…

MALICIOUS

PDF

55.2 KB Created: 2021-05-13 03:32:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 48ac19851e38c55fee9f1896e3d33106 SHA-1: 5c5ed664af8e13872fb37723953a66590994458c SHA-256: 9b023587bf08447cf513c4b1f522eb914f2f62451d8f8e175f16c6258e070219
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to websites promising game hacks and currency, indicating a lure for users interested in such topics. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of these links are present, likely to drive traffic to malicious or ad-filled sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9400

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 https://netcdn.xyz/app/431946152/free-ways-to-get-robux-game-hack PDF link annotation
    • http://sagrasantacroce.it/images/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://sagrasantacroce.it/images/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://sagrasantacroce.it/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-robux-generator-no-human-verification_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d11.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D11 42084 bytes
SHA-256: c08f7c1620ef07b78739e5fe4fc2cbfc0fba2df7877a96cc033133124e6f071d
font_01_sfnt_off0000a80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA80B 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000b4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B2 18724 bytes
SHA-256: 4748f019d46a9554f00c7c8cf9bb59ec204dfb95bc520e2d25b5a7c8ef81b270

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