Malicious PDF — malware analysis report

Static analysis result for SHA-256 f840f0a382f6e94b…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 14:37:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 29811589083a8143ace5f6023e95369b SHA-1: 27dc372a0e7b8a0912fe351a709558cf2b2388f1 SHA-256: f840f0a382f6e94b5b5da865b7f6bf517f88628baf44896eee08d22a37a1c592
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free currency, directing users to a malicious URL. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs further supports a phishing or scam attempt. No scripts were extracted, but the document's structure and content point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-spins-coin-master-links-2021-game-hack PDF link annotation
    • http://chem.ipb.ac.id/kim/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/hack-para-robux-gratis-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/tiktok-free-robux-hack_GM835599320.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-cheat-infinite-jump_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spin-link-for-coin-master-game_GM406889139.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30FD 23472 bytes
SHA-256: b19584795829fcb6c99a4d15a234ea21b42a848b0cd92da62356cdb7b7348625
font_01_sfnt_off00006624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6624 18748 bytes
SHA-256: 755f5d066d97737e2f601bc54173dd423b74488131d7b3ccc923b215b5cc75d4

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