Malicious PDF — malware analysis report

Static analysis result for SHA-256 f663b81d1c874eb2…

MALICIOUS

PDF

35.2 KB Created: 2021-06-28 16:02:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 00bcc1a1eb73c0a1369847f587843b8f SHA-1: eaa1e78a023aeefc63d9156f8cc1888846456e7d SHA-256: f663b81d1c874eb203a969a0fd9204ac94fc6188c56568580b39002ffedb68c1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, designed to lure users into downloading potentially harmful content. The document body and embedded URLs suggest a theme of game hacks and free items, a common social engineering tactic. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures indicate a high likelihood of the document facilitating further malicious activity, such as downloading a second-stage payload.

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.co/app/431946152/how-to-get-free-builders-club-roblox-2021-game-hack In PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/master-game_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/become-a-god-with-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-papers-simulator-hacks_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/unknown-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-hack-coins-in-reason-to-die-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-admin-commands-for-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-counter-strike-cheats_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-hack-fame-simulator_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-version_GM406889139.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
font_00_sfnt_off0000315a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315A 22152 bytes
SHA-256: ef0ec21b81c820fdbf63f6af7e18fd2062a4c784a09af889a9290c7c343b65da
font_01_sfnt_off00006243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6243 19756 bytes
SHA-256: b1fc12462f296cb7e75b7f638789793487075b0a8ea8e442779014b872e9c4cf

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