Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d5aa0d11e34ec8…

MALICIOUS

PDF

44.4 KB Created: 2021-05-19 10:42:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d8c49ab07d3f4b8c9f825aa587313d48 SHA-1: cdb41b70341d6bb826dc0aa6e2fb81ed381c09c3 SHA-256: 59d5aa0d11e34ec8a54c939d9c493ca881bcf0634b5ae00a6af23480a8b5d534
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically advertising free in-game generators and hacks. The primary lure appears to be related to 'Coin Master' and 'Roblox' game cheats. The document body, though heavily obfuscated, contains references to these lures and the malicious URL. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/406889139/20-free-spins-coin-master-game-hack In PDF document text
    • http://possumholler.us/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/pubg-uc-kaise-khariden_GM1330123889.pdfIn PDF document text
    • http://possumholler.us/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/www-robux_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://possumholler.us/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/robux-no-survey_GM431946152.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_off00004945.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4945 24488 bytes
SHA-256: 98b4cb2c1ac22e25d3718d0f1de6619d845a6cdef4c17955ec67ea02e3b850cc
font_01_sfnt_off0000811f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811F 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0A 18180 bytes
SHA-256: 322b0d5b629f6df55fd3c77851cbfe7ee71104dfe1b9214827344950ced1d0df

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