Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bfcccf7bc5247eb…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 08:24:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2481c5238873eb4470a620469502dd2e SHA-1: 448d5e15cb30eca5115a7ae18ff6ba0c99705e1a SHA-256: 2bfcccf7bc5247eb4d45c755067ae5e3e822d90830ee5b7f996916d17ebb2d3a
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier strongly indicated maliciousness, and the document body, though partially corrupted, contains URLs consistent with a phishing or scam attempt. The primary attack pattern involves luring the user to click on a link that likely leads to further malicious content or exploits.

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/431946152/free-account-roblox-with-robux-game-hack In PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-hack-computers-in-flee-the-facility-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-hack-adopt-me-2021-codes_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/fre-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-elemental-battlegrounds-free-diamonds_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-play-roblox-online-for-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-robux-2021-codes_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-today-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/robux-cheat_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-one-piece-millenium-stats-hack-script_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-coins-cheat_GM406889139.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_off000031ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AE 22944 bytes
SHA-256: eccb0d4d698fdfb1f6f3775748bff55d3c03b55916bb03a0364008f0fa60beb3
font_01_sfnt_off00006512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6512 19376 bytes
SHA-256: aca93b4e3f604d5c7fb305f64f27e26b52b7bc87275afcbcda3d4758617aefe4

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