Malicious PDF — malware analysis report

Static analysis result for SHA-256 31a5931faf103c3a…

MALICIOUS

PDF

46.2 KB Created: 2021-06-09 16:34:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2b13e399773be8d30406eaa4591de352 SHA-1: 77943657648b1e7647ec0d7e7403169443dc220c SHA-256: 31a5931faf103c3a98dd6660bca51e55acb414dec3222b684303b53b125bb907
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free generators to entice users to click on embedded links. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful websites.

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/roblox-icon-download-free-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-apoc-rising-skin-giver-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/pokemon-go-free-xp_GM1094591345.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/tiktok-free-coins-apk_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/tiktok-free-view-github_GM835599320.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_off00005093.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5093 28204 bytes
SHA-256: 0319473440a8c9c43aa71ecddf7233a93c624c874ba148f8985b3065f7fa4ece
font_01_sfnt_off000090cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90CB 18680 bytes
SHA-256: c84c0552b1145ac6c1aa68ad28a8890998e9349a46cdc094a3f73c9216faae56

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