Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5af6d5ecd4ee68f…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 07:06:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 22594fcb9d60dd8652ca8ab43b501b73 SHA-1: 44c846c366ae22009d84ccd4c37b8fcede52d829 SHA-256: a5af6d5ecd4ee68f67f162705aa9da86ff60a580f978a1d4ab5d4eaba9bf3777
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a game hack redirector lure, pointing to a known malicious URL. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting the malicious site. While no scripts were extracted, the presence of a malicious redirector and the lure suggest an attempt to lead users to a site that likely hosts further malicious content or exploits.

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/coin-master-spin-link-today-game-hack In PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-buy-robux-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-robux-gift-cards-for-free_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-please_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-roblox-bots_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-a-halo-in-roblox-royale-high-hack_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-apocalypse-rising-hack-july-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/que-hacer-cuando-te-hackean-la-cuenta-de-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/nonsense-diamond-roblox-hacks-fangs_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/bubbatron11-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-working_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
font_00_sfnt_off000030d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D2 23000 bytes
SHA-256: 88aeaea0fa5a5442f8b1d8a858c93852d79db447afc09363acf66098c7d47fcd
font_01_sfnt_off00006475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6475 18536 bytes
SHA-256: 232cb4b515db04c7b0e85e36ce0db153ce2fb992ec8f88a884e5f1f80d4c2854

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