Malicious PDF — malware analysis report

Static analysis result for SHA-256 351a44e139cc4ed7…

MALICIOUS

PDF

45.5 KB Created: 2021-06-10 14:28:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b79374a33520bf8fdfa43a493a03cb2a SHA-1: 62e59e9acc2c9860c02d3dbff137f9eec42e45b2 SHA-256: 351a44e139cc4ed7e53c42ad03e67d7921f320f276f779d0bda6313392ec1a8e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically targeting users interested in game hacks and generators. The primary lure is 'free Roblox Bee Swarm Simulator exploit game hack'. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector chain designed to lead users to potentially harmful content or further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/free-roblox-bee-swarm-simulator-exploit-game-hack In PDF document text
    • http://altc.de/images/cheat-roblox-dungeon-quest_GM431946152.pdfIn PDF document text
    • http://altc.de/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://altc.de/images/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://altc.de/images/free-santa-obby-roblox_GM431946152.pdfIn PDF document text
    • http://altc.de/images/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://altc.de/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://altc.de/images/free-roblox-combo-list_GM431946152.pdfIn PDF document text
    • http://altc.de/images/hacks-para-infinity-anime-roblox_GM431946152.pdfIn PDF document text
    • http://altc.de/images/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://altc.de/images/how-to-know-if-a-roblox-hack-has-a-virus_GM431946152.pdfIn PDF document text
    • http://altc.de/images/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://altc.de/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://altc.de/images/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://altc.de/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://altc.de/images/how-to-add-free-robux-to-your-account_GM431946152.pdfIn PDF document text
    • http://altc.de/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://altc.de/images/como-hackear-roblox-en-pc_GM431946152.pdfIn PDF document text
    • http://altc.de/images/how-to-hack-roblox-accounts-on-pc_GM431946152.pdfIn PDF document text
    • http://altc.de/images/roblox-weapon-cheat-codes_GM431946152.pdfIn PDF document text
    • http://altc.de/images/roblox-person_GM431946152.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_004_off0000515b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x515B 26648 bytes
SHA-256: a6f34c375fa7631fcf085fc00d54dfe194b961c7066d1b1d361c0a64d8f34342
font_01_sfnt_off00008ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCC 19140 bytes
SHA-256: f106b1e5d05d13601329c934d964733a0cd1072799055ed5bfa3019aca76d1ee

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