Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff66f21ef2f5e91d…

MALICIOUS

PDF

42.9 KB Created: 2021-05-11 20:37:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3de1871a517e1058337b5f32bc9e9bf8 SHA-1: 64e58f7ca6c18d2facccd683ea65d5097db8af90 SHA-256: ff66f21ef2f5e91dd87b4ce83e307827209d2a8bdf6c28f00fc7c180f8980c26
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hack generators. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the nature of the lures suggest an attempt to direct users to potentially harmful websites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/minecraft-net-download-free-game-hack In PDF document text
    • http://playmoorecello.com/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://playmoorecello.com/images/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://playmoorecello.com/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://playmoorecello.com/images/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://playmoorecello.com/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://playmoorecello.com/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://playmoorecello.com/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://playmoorecello.com/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://playmoorecello.com/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://playmoorecello.com/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://playmoorecello.com/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://playmoorecello.com/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://playmoorecello.com/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://playmoorecello.com/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://playmoorecello.com/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://playmoorecello.com/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://playmoorecello.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://playmoorecello.com/images/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://playmoorecello.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://playmoorecello.com/images/minecraft-toolbox-premium-apk_GM479516143.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_off00004b19.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B19 25440 bytes
SHA-256: 245f9168e12db18a61b3f2af0017915c3772b4ebc16f18eea2b1af0df1a4b82c
font_01_sfnt_off0000853f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853F 18292 bytes
SHA-256: 496601abebed6a966dbf1b847dcb2b1aed243a9da0268eb4d87cd87739f421d3

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