Malicious PDF — malware analysis report

Static analysis result for SHA-256 b73b50aab6fb4e74…

MALICIOUS

PDF

45.8 KB Created: 2021-05-18 03:57:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 174122e6fd7e8b909773738529f98823 SHA-1: aa11883c2e17f80ed1ea279377060a0ef3e5d845 SHA-256: b73b50aab6fb4e748819cea6d9698f6217a676ac1111a0da2265d1a3ca6d85f5
160 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious redirector links, specifically pointing to a 'free generator / game hack' lure. The document body, though partially corrupted, contains text related to free games and includes the malicious URL. The ML classifier also flagged this PDF as malicious. The primary attack vector appears to be social engineering to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/free-games-like-roblox-game-hack In PDF document text
    • https://www.sensationboats.com/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://www.sensationboats.com/images/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://www.sensationboats.com/images/picture-roblox_GM431946152.pdfIn PDF document text
    • https://www.sensationboats.com/images/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sensationboats.com/images/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.sensationboats.com/images/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sensationboats.com/images/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.sensationboats.com/images/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • https://www.sensationboats.com/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://www.sensationboats.com/images/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • https://www.sensationboats.com/images/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • https://www.sensationboats.com/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://www.sensationboats.com/images/coin-master_GM406889139.pdfIn PDF document text
    • https://www.sensationboats.com/images/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.sensationboats.com/images/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://www.sensationboats.com/images/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sensationboats.com/images/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.sensationboats.com/images/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • https://www.sensationboats.com/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://www.sensationboats.com/images/open-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA1 25344 bytes
SHA-256: fd81b219a2f39efe077559536345de815077d789d26cf2e315c905c02fe50dfa
font_01_sfnt_off00008550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8550 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00008f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F39 18724 bytes
SHA-256: c52aceaf3bf2f28584fb8940f828c012a6342ba7c3f090d8a14e40bb36c01879

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