Malicious PDF — malware analysis report

Static analysis result for SHA-256 c879a6ab6aa22835…

MALICIOUS

PDF

33.7 KB Created: 2021-06-25 14:13:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 70f53993d49354cd9b7d8552197d609d SHA-1: 721a3a59a7d4226f3b626cc49ca3ca9e21d27187 SHA-256: c879a6ab6aa22835e62597ce0a9423f4f69e7f4b7a21b3b73cc217c3108617b8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to game hack generators and free spin lures, with a primary redirector pointing to 'netcdn.co'. The document body and heuristics indicate a lure for obtaining in-game currency or cheats, likely leading to a malicious download or phishing site. No scripts were extracted, but the embedded URLs and redirector behavior are strong indicators of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-cheats-ipad-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/pubg-uc-hilesi_GM1330123889.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-no-card-roblox-card_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/pubg-uc-4all-cool_GM1330123889.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-hacked-version_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
font_00_sfnt_off00002d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3E 22096 bytes
SHA-256: 815206727039218f28e974ef119dcc78bf408e56d7edd9c5e2cf987c67350609
font_01_sfnt_off00005e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5A 19104 bytes
SHA-256: 73712f7470268290e8b5bbb4890f7c32087b178cc6e96ea3628ccf14a1aeabbc

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