Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a3f7df20087e32…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 15:35:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0e8146a3ab33a293b271bd30f183cdbb SHA-1: c8f570dc44c77a84c664900c449bfdb8f7a58bf4 SHA-256: a1a3f7df20087e32ffbfe799b27930715e68418759442fc73ecd53bb2cbad279
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The ML classifier strongly indicates maliciousness, and the presence of a download button lure further supports a phishing or scam attempt. The document's primary function appears to be directing users to potentially harmful websites.

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/cm-spins-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-free-robux-hack-2021-generator-cheat_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-cube-defence-cheat_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-project-pokemon-free-pokemon_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-generator-2021-download_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-promo-code-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-codes-assassin-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hack-without-downloading-games_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-make-hack-game-in-roblox_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_off00002ee3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EE3 22912 bytes
SHA-256: 7c6f22c978877095d8444ccb4e038c3f4f2073e6453afe2c07e2b1e1a50abc2b
font_01_sfnt_off0000620d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620D 18024 bytes
SHA-256: 52574b576517650a2d4944a96997cef0da5309193ccf51e71062ce41d5614766

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