Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c92693888a485e8…

MALICIOUS

PDF

44.1 KB Created: 2021-05-13 21:40:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4bf1c4f6d34d8d8214bfdf7fb155d354 SHA-1: a99fa1933ba85ca9c7318f3782b6761a4ed75054 SHA-256: 4c92693888a485e8cbd3e5073280a6cac3bf5536cff042e363c9314b34425de3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and potentially unwanted content, masquerading as game hacks and free currency generators. The primary heuristic firings indicate that the PDF is designed to redirect users to malicious infrastructure, likely as part of a phishing or scam campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to external sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-spins-coin-master-links-blogspot-game-hack In PDF document text
    • http://apotema.com.co/ufiles/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://apotema.com.co/ufiles/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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
stream_003_off0000480f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x480F 24004 bytes
SHA-256: dcc2459dcbbc4a9b0f397396ef4da04c21013c5881d0e1ce41e22fe3137ec73a
font_01_sfnt_off00007f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F08 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000088ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88BA 18632 bytes
SHA-256: e19cb03e4db5dc0ff2825ab1b6cd29120edbbac4e5fd870bab1836bcb421f615

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