Malicious PDF — malware analysis report

Static analysis result for SHA-256 04af374a8f92e8c2…

MALICIOUS

PDF

53.4 KB Created: 2021-05-19 04:24:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 70ec4f112b6cfe2984983d4ee1ceec27 SHA-1: 5f7f8beb1bb7abac992a59567d8fa67245ac87cf SHA-256: 04af374a8f92e8c2568204b0febdc679119f30f8c60f0b082d4cc56eb5779f6b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game-related cheats and generators, directing users to malicious redirectors. The embedded URLs point to other PDF files hosted on suspicious domains, likely serving as part of a phishing or scam campaign. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9231

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/how-to-get-free-skins-in-roblox-game-hack In PDF document text
    • http://eltisstudio.sk/images/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-spins_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-coins-for-flip-master-online_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
stream_003_off0000499d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499D 42120 bytes
SHA-256: 089e469504f4f6c905fc94b9b2f676287d20640bf9602136d9c9cb19522d19ad
font_01_sfnt_off0000a3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C9 2956 bytes
SHA-256: 3acb1953cd6e12ae7739d2a2a4a4364a7837dc02ec385ccd2ceaf0df73d156fc
font_02_sfnt_off0000ae09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE09 18504 bytes
SHA-256: ae7b9a4d98c4f3218572a7a5b8a0359ca417a6e67a065e6d54194df4d1c80092

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