Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ff0665cd1202da…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 00:32:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 43032ca49169da5055e65c119d862225 SHA-1: e0ee055714166f3581c935eced5800de870d5416 SHA-256: 16ff0665cd1202da83535e36740fd25b82c70fd82dc037b30797f8e4123381a8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple external links disguised as game hacks and generators, such as 'free-robux-place-game-hack'. These links are designed to lure users to potentially malicious websites. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-place-game-hack PDF link annotation
    • http://kirikkalesmmmo.org.tr/images/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://kirikkalesmmmo.org.tr/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004822.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4822 25968 bytes
SHA-256: bad0e4b03fc0fe303398b27df95a86d0096de81be64c3e5b015506b996311eb0
font_01_sfnt_off000082b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B3 18472 bytes
SHA-256: a8315d3de564ce67f995c8887965c7d9f34366905f839248eafe88b792a59691

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