Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b3aba376245fd8…

MALICIOUS

PDF

42.8 KB Created: 2021-05-17 11:39:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 81b1d0117e33ff2123cc8fe2cd495edc SHA-1: 8b5cc58ce5e7cb0d48d2206b9976f9627b5538cf SHA-256: 17b3aba376245fd8024ccea28183e76f121df70bcb35f2b2255d4f1bcdbfecb5
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on what appear to be game hack generators or free currency sites. The primary link redirects to a malicious domain, and the document itself functions as a link farm, likely intended to drive traffic to potentially malicious or scam-related content. No scripts were extracted, but the PDF structure and embedded URIs strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/mistplay-robux-game-hack PDF link annotation
    • https://www.littlerockholidayresort.co.za/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.littlerockholidayresort.co.za/images/are-there-any-coin-master-hacks-that-actually-work_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
stream_003_off00004b5c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5C 24276 bytes
SHA-256: bbfeb52028f37bafd822755138a373f394ed5295e4a63b58c524d0c4c6196d2c
font_01_sfnt_off000082c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C9 18928 bytes
SHA-256: 4353d9d8b624be656c092b8c8f3622dfb05908b0fd9cf93c1f73531fdc9e42e9

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