Malicious PDF — malware analysis report

Static analysis result for SHA-256 170e21cadee509b5…

MALICIOUS

PDF

48.4 KB Created: 2021-06-13 22:56:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c6c1a380c59c4ebf60918ffdb6596743 SHA-1: 0957e5888a6e0b954008f8c033ae8d2f147bde48 SHA-256: 170e21cadee509b553c470da583e219a12f733955ee284485c9fa45a570366fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically advertising free game currency or hacks. The heuristic PDF_GAME_HACK_REDIRECT_LURE and PDF_MALICIOUS_REDIRECTOR_LINK strongly indicate a social engineering attempt to lead users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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 http://netcdn.co/app/431946152/free-roblox-clothes-templates-game-hack In PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/pubg-uc-or-g-card_GM1330123889.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/hack-i-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • https://elearning.mayastisingkawang.com/__statics/gudangsoal/files/optifine-pe_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B46 28772 bytes
SHA-256: 601b8a110bdae77a3c2d7d66f89a1eccaf13f8f48876d2b6ca2931383a62de18
font_01_sfnt_off00008c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C54 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000098fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98FB 18884 bytes
SHA-256: 640c63db932491e4e87d0cbe8bcafce8540653682ab1762ebca962469be3fa30