Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa7e43f72ac115f…

MALICIOUS

PDF

35.6 KB Created: 2021-06-18 03:35:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 68b71dbc63ddc616ac3f716d3d30eff4 SHA-1: f5a6b0ff18c131aa10cae5045ec15e277a300cbf SHA-256: caa7e43f72ac115f0ce3acc05ec10d3b84b4c9795dc804d9ffbc8657ae7a2687
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, with a critical heuristic identifying one as a malicious redirector lure for 'free Robux' or 'game hacks'. The document body and heuristics suggest a social engineering tactic to trick users into clicking these links, likely leading to a malicious download or further compromise. No scripts were extracted, but the presence of embedded URLs and the lure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-june-2021-game-hack In PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-forum_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-money-in-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/pokemon-go-free-3-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-anti-afk-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/cheat-teleportation-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/wurst-18_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-itfunneh-roblox-acc_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-pe-hacked-client-download_GM479516143.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_off00002f57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F57 23852 bytes
SHA-256: 369193a327815edcd1a281c5d73d38f9e664d6f9e41ac33980726349fbec33ef
font_01_sfnt_off0000657e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657E 19284 bytes
SHA-256: 29664bc09ac95f172fbfd3278cd3e47b67f35a37e044d2e1d1e80033559fee1b

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