Malicious PDF — malware analysis report

Static analysis result for SHA-256 235a34b2c6a455f7…

MALICIOUS

PDF

41.0 KB Created: 2021-05-16 04:38:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 925f5063f60ee98485d0df24424bf67a SHA-1: 1d378aad90ce0bf168db8a704fb3a757f68cbb52 SHA-256: 235a34b2c6a455f79a6b56a094252550d3199bbf7ebbd13061a29852122bc5a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as generators for game currency and hacks. The document body and embedded URLs strongly suggest a phishing or scamming attempt, aiming to lure users to potentially malicious websites. No scripts were extracted, but the presence of multiple redirector links and the ML classifier's high confidence indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-gold-cards-for-coin-master-game-hack In PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/easy-robux_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.zagorjeadventureteam.hr/files/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/roblox-but_GM431946152.pdfIn PDF document text
    • http://zagorjeadventureteam.hr/files/how-to-hack-people-in-roblox_GM431946152.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
stream_003_off000048fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48FA 23780 bytes
SHA-256: c4d18505872c4f56aa7c243487643498d4cb7b804d2adaa55ccc2c69b9ceee53
font_01_sfnt_off00007ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED8 17960 bytes
SHA-256: e7d6a33110c05f2f7358e31e331cf325c9b09bbae5ece44b659e3c4bfc76bc90

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