Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40ae430406ae26c…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 19:52:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 62bb4b2c3902b4c054106a024ca5809d SHA-1: 909c89faf5228f7408cbbaeb460142188eae9f41 SHA-256: a40ae430406ae26cbb2a26c4bda34b650d24ac73c2dfb09c43a62fd512d24572
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, designed to lure users into clicking on offers for game hacks and free spins. The primary malicious link is http://netcdn.tw/app/406889139/collect-free-spins-for-coin-master-game-hack, which is associated with a game hack lure. The document's structure and content strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

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.tw/app/406889139/collect-free-spins-for-coin-master-game-hack In PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-helmets-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/how-to-hack-any-tycoon-on-roblox-wiki-how_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/juego-hackeado-de-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/roblox-hacks-for-hilton-hotels_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/roblox-accounts-for-free-with-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-roblox-codes-2021-no-human-verifivation_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/sex-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/mcpe-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/roblox-highschool-cheats_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/hacker-skin-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi//repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/css-roblox-injector-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stie-alanwar.ac.id/sirkulasi/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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_off000030ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30ED 22784 bytes
SHA-256: 8656f60a1eba4f43137817ff85e183e001f20f9f877222773504cc4c8d92a941
font_01_sfnt_off0000642b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642B 18248 bytes
SHA-256: bb7de50ef59c2fb20db53529cc2c7c2498890c70cfa5b396a93a55e52229accf

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