Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94a6d8635efa56f…

MALICIOUS

PDF

34.4 KB Created: 2021-06-28 15:35:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 276373ece872a3700ffab01fbbba6446 SHA-1: e617467834c9f48b97078f0b2ec2056c427bed0b SHA-256: d94a6d8635efa56fd20983f4ab75a1639327a399d867a7df0b1e9eb7960c49cd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free game currency or cheats. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_GAME_HACK_REDIRECT_LURE' indicate that the primary purpose is to lead the user to a potentially harmful site. Although no scripts were extracted, the embedded URLs and the nature of the lures suggest a phishing or social engineering attack aimed at tricking users into visiting malicious sites.

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.co/app/431946152/roblox-mobile-hacks-4-free-robux-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-750k_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-account-generator-old-accounts_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-noclip-and-fly-hacks_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/cerberus-roblox-download-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-stuff-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hex-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/buzz-free-robux_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
font_00_sfnt_off000031c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C2 21444 bytes
SHA-256: ed084ac5d39ebae4d87612b2748324dab2fa830fadc007645096a402d919627d
font_01_sfnt_off000060c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C8 19336 bytes
SHA-256: 993f7e748661c88a0f1835155e7fe49e95ece9b70c86c3d1bf8520d3488df85b

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