Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80f81c410f31811…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 09:45:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a3bc6130f84250ad944011c60dd6cd7d SHA-1: a9860169d09652c517f890dc3662b6962f5fe69d SHA-256: b80f81c410f31811e9addde9c27a65f6817c8ae789f090473c7f6f0d0305235a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as free game hacks and generators. The primary lure URL is http://netcdn.tw/app/479516143/how-to-host-a-minecraft-server-for-free-game-hack, which is associated with malicious redirector infrastructure. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful 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.tw/app/479516143/how-to-host-a-minecraft-server-for-free-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/free-airport-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-did-someone-used-lots-of-hacks-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/i-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/pubg-uc-or-g-card_GM1330123889.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-free-roblox-with-kali-linux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-boy-outfits-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/new-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/quel-touche-faire-pour-avoir-lz-free-code-dans-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-cheat-on-songify-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-account-roblox-with-robux_GM431946152.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
font_00_sfnt_off00003031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3031 22800 bytes
SHA-256: 924747c268271566a83e32637c88b32558327ea5e3c8904709843a0f8b7548ec
font_01_sfnt_off0000630a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630A 18276 bytes
SHA-256: 436412b7fb518003dd72d9755af4c5c221d015181f25d6fbbc5784d75a3c116b