Malicious PDF — malware analysis report

Static analysis result for SHA-256 275aabdddaf039d1…

MALICIOUS

PDF

56.3 KB Created: 2021-05-14 05:08:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dba19b1a78a34ed6ed8416e2805dae8d SHA-1: 509a13095743cca68ae4cefe1e96978e960005d7 SHA-256: 275aabdddaf039d12d6e386900e143ccac20e02368d9130671d47b42408f2216
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks or generators. The primary lure appears to be related to 'Coin Master' free spins, aiming to trick users into clicking the malicious links. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a redirection-based attack, likely leading to further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8160

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-on-coin-master-2021-game-hack In PDF document text
    • http://atrax.hr/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/lazyblox-com-free-robux_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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D05 27184 bytes
SHA-256: 107c647407296784e3d21a9d387d11ea0789551795f2d6ee9c5e858c2f2df877
font_01_sfnt_off00008d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D33 3088 bytes
SHA-256: e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222
font_02_sfnt_off000097fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97FE 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000ab23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB23 18288 bytes
SHA-256: e7fc04cebd192de8ea685c8f65a9790caba4d729d1f53b0455241ee170bde56f
font_04_sfnt_off0000cd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3B 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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