Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f5fcfa88a762dc…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 08:38:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: fde13360b1dfc7497227829e22a0b6bb SHA-1: 44d82259501a72e42a051f811184beb448b6a844 SHA-256: d3f5fcfa88a762dc4bcf52632b95fa93128f385746a2c3694cd2ee5bca79a356
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, disguised as 'free generators' or 'game hacks' for popular games like Roblox. The document body and embedded links strongly suggest a phishing or scam attempt to redirect users to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector is embedded, likely leading to further exploitation or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/431946152/how-to-get-free-roblox-money-game-hack In PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/get-more-robux_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/roblox-hack-for-life-in-paradise_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fe2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FE2 29700 bytes
SHA-256: afda76a18627e839e2deff1689a872f0c23ba67b00782b20ce23bfff189d84e2
font_01_sfnt_off00009282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9282 18592 bytes
SHA-256: b73f1f0d33754a6311a400e0f9b7fa1bed8423beec91854f27c9eb8add8b4fcc

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