Malicious PDF — malware analysis report

Static analysis result for SHA-256 a94b55d27cae731b…

MALICIOUS

PDF

43.6 KB Created: 2021-05-17 05:02:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4deb2d0a2317a45a73af506d643adbf5 SHA-1: acf27e062e12ac11b4034c590b9f8b4d39ff065e SHA-256: a94b55d27cae731b9fcdd55e963e464375ce3c2926d06f5a8cfb02171da31c9d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising free game currency and hacks. The ML classifier also flagged this PDF as malicious. The document body and embedded URLs suggest a lure for users seeking in-game advantages, which ultimately leads to a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/rbl-gg-free-robux-game-hack In PDF document text
    • https://www.stadtbesichtigungen.de/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stadtbesichtigungen.de/images/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4985 26684 bytes
SHA-256: cf5ce38ffc041012f56c8ade475ba9276296ec5a14c11bac01ec3d462a12b1c0
font_01_sfnt_off000087c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C3 18376 bytes
SHA-256: 36d8e5c8df31ce5774558eb4dff236d908794f1052653b7bf9d7a2310610d2b4

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