Malicious PDF — malware analysis report

Static analysis result for SHA-256 37e3b98ac6ccd090…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 14:54:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a05e62c5058eb9176949c174c9f52366 SHA-1: c385bfe29f012766f2d5eac02cf74613d6377c9d SHA-256: 37e3b98ac6ccd09044b2a8dec6f26e7361d474a4f380d98f037fecf4f163b1e4
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, that promise free in-game currency or hacks. The document body explicitly mentions 'Claim Free Spins Coin Master' and includes the malicious URL, indicating a lure for a scam or potentially further malicious downloads. No scripts were extracted, but the embedded URLs and the nature of the lure strongly suggest a phishing or scamming 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.tw/app/406889139/claim-free-spins-coin-master-game-hack In PDF document text
    • https://library.uigm.ac.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-admin-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/ccv3-roblox-hack-tutorial_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-t-shirts-that-are-cool_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-lost-cheats_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-website-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-hack-no-human-verification-2021-ipad_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/get-free-builders-club-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-synapses-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/pubg-uc-generator-2021_GM1330123889.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/give-me-free-robux-plz_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-for-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/mad-city-roblox-hack-script_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_002_off00003078.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3078 23432 bytes
SHA-256: 0e4069c7e7599b9f42891549ca5844536160ad3b3ef8a78d52e0e96319e3320d
font_01_sfnt_off0000650c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650C 18508 bytes
SHA-256: 66edbbd631945b07c06d9fd06a14c74e41c138e401aa3f28fe2d50c5e2faa941

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