Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e93688b3e9e73a3…

MALICIOUS

PDF

33.8 KB Created: 2021-06-30 05:25:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f630e09f4897d44b1fb9a87ec7d40b93 SHA-1: 99c605ddab70a863394c2a6ee424acc746de3c10 SHA-256: 6e93688b3e9e73a3ec15c65188abf13726b876e3d872be002e7446e04ca8fc11
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external sites, including a primary redirector at http://netcdn.co/app/431946152/get-robux-free-2021-game-hack, which is associated with malicious activity. The document body and heuristics indicate a lure for game hacks and free currency, aiming to trick users into visiting these malicious sites. No scripts were extracted, but the embedded URLs and link farm structure strongly suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/get-robux-free-2021-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/admin-commands-hack-roblox-script-pastebin_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/pubg-uc-voucher_GM1330123889.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/funn-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/como-ser-hacker-en-roblox-con-poderes_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/code-roblox-saber-simulator-free-pet_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-cheats-code-for-money_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-hack-script-booga-booga_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/i-got-hacked-in-wierd-writing-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-welcome-to-bloxburg-how-to-get-free-money_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-hack-naval-warfe_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/bowy-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-free-generator-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-mods-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/is-it-easy-to-hack-a-roblox-account_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/top-ten-free-roblox-items-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-printable-minecraft-coloring-pages_GM479516143.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_off00002ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA1 21620 bytes
SHA-256: c4a338573d6d792e631624ea1e2fe68b5c1fb9085c47c0912488082f6275c4cc
font_01_sfnt_off00005e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6B 19224 bytes
SHA-256: c7e6ea762fc2e85d80aa6669a0bc8c0fc47ec2f37a4be0fa16c010cf46ec438a

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