Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8f9c977ce65914…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 07:56:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 983ff1b13243ff18b209da30bbef89b0 SHA-1: 21b0041eb14926f61df875654a7992035ed024af SHA-256: fa8f9c977ce65914690052a7c716184c1670b1770dd810d1d9dc8db29fefcd52
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, with one specifically identified as a malicious redirector leading to a 'free generator / game hack' lure. The document body and extracted URLs reinforce this theme, suggesting a social engineering attempt to trick users into visiting potentially harmful websites. No scripts were extracted, but the presence of embedded URLs and the nature of the lure indicate a phishing or scam attempt.

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/406889139/50-free-spins-coin-master-links-game-hack In PDF document text
    • http://mb-alati.hr/files/how-to-get-hacks-on-roblox-2021-fort-albreta_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/can-any-codes-give-u-free-robux-2021-working_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/roblox-phantom-forces-hack-dll_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/how-to-hack-roblox-game-money_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://mb-alati.hr/files/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-movie-websites-tiktok_GM835599320.pdfIn PDF document text
    • http://mb-alati.hr/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/hot-to-get-free-robux-2021-may_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://mb-alati.hr/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-robux-no-verification-or-survey_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_002_off00003047.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3047 22296 bytes
SHA-256: d352d8e3a7faee12691f35846da3dfc63a0a6344c30f6c451b663cf12686baa9
font_01_sfnt_off000061c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C7 18648 bytes
SHA-256: 7cb7b4aa4fe43c538a35ca12efa1607bb190a4a0226e989e68a2df4e99bf3741

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