Malicious PDF — malware analysis report

Static analysis result for SHA-256 e341a560bcd9f115…

MALICIOUS

PDF

47.8 KB Created: 2021-06-09 03:49:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7aa9968b888ad0548e416cf156e5bce5 SHA-1: d4738445ed0376d1aa70cac8588c9c0e7fa8bd41 SHA-256: e341a560bcd9f1155e80143977f5f45b7b71b6df977f57b59468703076536bdf
160 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to a malicious website, masquerading as a game hack generator. This lure is designed to trick users into visiting a potentially harmful site. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent, likely to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/hacker-roblox-robux-game-hack In PDF document text
    • http://tileworld.com.au/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-re_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/minecraft-classic-free_GM479516143.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_004_off00004e14.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E14 24572 bytes
SHA-256: 7f0167ddc91abba7ab9851f95e5e7a2a01ac4386e48b2960d2b07966aa873e0e
font_01_sfnt_off000085e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E6 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_02_sfnt_off000097c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C9 18320 bytes
SHA-256: 20819690de087814f6f36f8f71d5dcffb8a682f172b48b7b1c3c0460e0577870

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