Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d1178e9d29db996…

MALICIOUS

PDF

51.6 KB Created: 2021-06-07 11:22:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5264b56e1b244ad038c2e157aa238b38 SHA-1: 16ac0798f366538c315c9a1f4509b6b3891b3d58 SHA-256: 7d1178e9d29db9965cae38ed61526242fdbdb787ab5ff34c8dc9e7e0c0288de3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that are identified as malicious redirectors, specifically targeting users interested in game hacks and generators. The document body and embedded links suggest a lure to download or access content related to popular games like Roblox and Minecraft. The presence of numerous redirector links indicates a high likelihood of leading users to malicious sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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/roblox-jailbreak-hack-unjailbreak-script-game-hack In PDF document text
    • http://zercalo.org/images/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-tiktok-fans-hack_GM835599320.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/easy-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-spins-link-in-coin-master-2021_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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000511b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x511B 26972 bytes
SHA-256: 7409d2109648708af81a575d6f009cb6961132fa72b63fe820f69c6aa408ce13
font_01_sfnt_off00008d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D98 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9744 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA456 19124 bytes
SHA-256: 82e6bbd5e3797729af76803d4fbb30dd00e363cb513384ec034e863194c5c3a5

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