Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b2e0c5a6fd328c…

MALICIOUS

PDF

43.1 KB Created: 2021-05-17 08:13:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 963d85fce64eb675697290c4e872d09e SHA-1: d04edf1862cd3f3b01df2ea73f792f0711044196 SHA-256: c6b2e0c5a6fd328c5071c6f049170344067cec88ae9fd82141512a6fdd8bf8fd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristic firings indicate a lure for free Robux or game hacks, suggesting the intent is to redirect users to potentially malicious content or download further payloads. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/can-i-get-free-robux-game-hack In PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/earn-robux-today_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/robux-now_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • https://www.communes.comIn 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_off0000490e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x490E 26884 bytes
SHA-256: 29bf78a23af2e4f33176010cf2f1e39efe7ef870f057f211d5350e0befbfd289
font_01_sfnt_off000085ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85EE 18344 bytes
SHA-256: a3821bea5d8002917ca36036ff520c3c0be187df4be91a81bd8356ddd2b369c9

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