Malicious PDF — malware analysis report

Static analysis result for SHA-256 aad3ef546fd9303f…

MALICIOUS

PDF

50.7 KB Created: 2021-06-03 13:43:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f1f2c61d7e8e1dbdaaee0875ff34a62d SHA-1: 6c8ad3d6ecf72a0f333994a4da6191b76f1715ba SHA-256: aad3ef546fd9303f7c955253544d2c11a6d5661f7e875995d427cec36900c4da
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure to trick users into clicking a link, which is a common social engineering tactic. The embedded link directs to a malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user interaction, potentially leading to further malicious downloads or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.online/app/431946152/free-robux-codes-2021-real-game-hack In PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/20210-pubg-uc-in-indian-rupees_GM1330123889.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/how-many-tiktok-free-folowers-make_GM835599320.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://robuxhaxs.comIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005474.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5474 28128 bytes
SHA-256: 134cf3da959b51964a3d1fec21111bf974efd26ee74068d577f5a3661827efaf
font_01_sfnt_off000097f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97F7 2824 bytes
SHA-256: 1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189
font_02_sfnt_off0000a1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A4 18892 bytes
SHA-256: 79fc292783aafa0d2798f175881928b0c75cb864ff282a378c41953696f75480

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