Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5092c3500a9c61…

MALICIOUS

PDF

41.9 KB Created: 2021-05-13 00:16:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 88feb0bdaa2a1e318e4757adfc3159d6 SHA-1: a47fc8eccf892c66f1fe8881eb16a81c9362fe4a SHA-256: 9c5092c3500a9c61d7c38ac9d3e66e0d75fdf255cedeb2d54c06d6d1122f3080
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and sites offering "free generators" or "hacks" for popular games, which is a common lure for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. The document's primary function appears to be directing users to these malicious sites, likely as part of a phishing or credential harvesting campaign.

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/479516143/minecraft-name-tag-hacks-game-hack In PDF document text
    • https://shjbottle.com/upload/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/robux-no-survey_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/roblox-ban_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://shjbottle.com/upload/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://shjbottle.com/upload/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-free-coins_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
stream_003_off00004a23.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A23 24204 bytes
SHA-256: c3af74448048fe921afffe20acab7333fcb80413dc2e1477eb583206ab5836c4
font_01_sfnt_off00008172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8172 18288 bytes
SHA-256: eb7ed4260d6d64c3cd9f3242d6af3157cea31df7eff6e4be90ec8e6c005c47d1

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