Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b911dc15306e97…

MALICIOUS

PDF

46.2 KB Created: 2021-06-11 02:23:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 97c42b3567243038ff10b5a6188637cb SHA-1: 5e550959bf5c4b9fcd9acf2b1258aa53dc43c973 SHA-256: 61b911dc15306e97ef874af36135ffb38bbc75d7aee18e50b0b25e5f437c5184
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with 'game hack' content, strongly suggesting a phishing or malware distribution attempt. The document body and embedded URLs indicate a lure for free in-game currency or hacks, likely leading to a malicious download. No scripts were extracted from this sample.

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/how-to-get-free-things-from-the-catalog-on-roblox-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robux-pin-free-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/blood-and-iron-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/games-in-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-script-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-tools_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/proprofs-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-no-gift-card_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_off000050e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E6 27096 bytes
SHA-256: 56421411383dd4f6f9afd0de539cd6be9f0a91b0f5e5ecb78acbaf5c19ee15f5
font_01_sfnt_off00008f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F43 19280 bytes
SHA-256: b31f1d3e0838a2664f9a1fe7953a3c0a2e9b8a303f8b88e03e64c634de9a4651

Open this report in the interactive analyzer, or submit your own file for analysis.