Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac2f817313012887…

MALICIOUS

PDF

45.5 KB Created: 2021-05-11 21:43:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8dcb1785e84500d09fab8e3295366d99 SHA-1: efff8919798d56e12b420c42b1a2a9a8f02aeab1 SHA-256: ac2f817313012887e6488f3dc4c5b64b6209a636e9e4309c4bc69140c3456698
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and external sites that promise game hacks and free currency, a common lure for malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious redirection workflow, likely leading to a second-stage download or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/406889139/coin-master-free-spin-realme-products-game-hack In PDF document text
    • http://geometraperiotto.it/images/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/earn-rbx_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/roblox-2021_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://geometraperiotto.it/images/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://geometraperiotto.it/images/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b28.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B28 25076 bytes
SHA-256: ec15dae872608c8fe8bf337f7bb04c97f66a748f3c3ca5a7d3a6462a91aa9e3f
font_01_sfnt_off00008465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8465 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E16 18688 bytes
SHA-256: 2b96984a12e9234f7a54c21b84caea4c40bc9a6928fd3166a16ecb8c3482d419

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