Malicious PDF — malware analysis report

Static analysis result for SHA-256 2241dc553882f358…

MALICIOUS

PDF

43.3 KB Created: 2021-05-22 06:12:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 98ec495df108e35f42d1804478977c60 SHA-1: c7413cee0cea3c3407afa42e3743527b8da0a9fb SHA-256: 2241dc553882f3588fb89777a8a9c36168739eb3823fbc9573f371c7322e42c4
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a remote-support lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7947

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/479516143/minecraft-hacks-game-hack PDF link annotation
    • http://arch-centr.ru/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://arch-centr.ru/images/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/pokemon-go-free-ditto_GM1094591345.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000345b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x345B 31540 bytes
SHA-256: 9e10dd4f280977ff79f75156ae31e8711084f79f4a9ec6d7cedf362e3288fb73
font_01_sfnt_off00007529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7529 3020 bytes
SHA-256: f1a29adcea636583330be8db4f6466410de551ac48576b9e1aa5c34e2d665a1f
font_02_sfnt_off00007f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7D 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off0000898d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898D 17740 bytes
SHA-256: 0307ae1fdf286ae380d36e270ef5c992f348f7a5470d5d5ce449782a5f21d577

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