Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d0b4ae444f9df0…

MALICIOUS

PDF

50.6 KB Created: 2021-05-10 13:49:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 265eea44d433a106cee8000d4fb2a1ff SHA-1: beb6d683cab913a3bcf79398944bb373311ffe82 SHA-256: 44d0b4ae444f9df0441636741626167e617887db8dec3a7a030474226cd75338
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. These links likely lead to further malicious content or malware downloads. The document body and embedded URLs reinforce this lure, aiming to trick users into clicking through to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9212

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/431946152/free-robux-no-human-verification-or-survey-or-download-2021-game-hack In PDF document text
    • https://reggieslockandkey.com/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/robux-website_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/block-best-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/oginject-co_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004841.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4841 26028 bytes
SHA-256: 9ead7d2ca8aeaacac4d7d75d5239e346d1de55c43b07d034c9e4e32d108f4e00
font_01_sfnt_off000085c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C7 3512 bytes
SHA-256: d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f
font_02_sfnt_off00009156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9156 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off00009dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DFE 20136 bytes
SHA-256: 66e5e50e12f5eb49621ab9bcd6ab85026409d616512a452c1eb3339dd9867554

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