Malicious PDF — malware analysis report

Static analysis result for SHA-256 44bff95968e7f29c…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 19:14:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1fb232a1ae9b09f948c6d7af19c134b4 SHA-1: 0cef482e3880309e9e4768712d94c16f90e3aa98 SHA-256: 44bff95968e7f29c0d9361a2c7689a087d3a0c32ffecff36e650f040068a1f85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free spins, directing users to a known malicious redirector. The embedded URL, http://netcdn.tw/app/406889139/how-do-i-get-free-spins-on-coin-master-game-hack, is flagged as malicious infrastructure. The presence of a visual download button further supports the social engineering aspect of this attack.

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/406889139/how-do-i-get-free-spins-on-coin-master-game-hack In PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-how-to-get-free-robux-without-hacking_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-free-play-no-download-unblocked_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/best-games-in-roblox-to-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/best-roblox-hacking-services_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hacks-on-roblox-to-change-ur-look_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-promo-codes-2021-may_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-ro-ghoul-how-to-get-a-different-for-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/2021-free-robux-daily-robuxian_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/popular-roblox-games-for-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-ninja-animation-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-robux-money-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-promo-codes-list-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-zone-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-ying-vs-yang-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-play-minecraft-for-free_GM479516143.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_off00003155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3155 23244 bytes
SHA-256: 2d0709028d0b813c2c28619f30d9407e3290ffddeed5d7e20068a5e0d7b9550d
font_01_sfnt_off000065e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E7 18508 bytes
SHA-256: 58f26242c5951b489404be3a4c793668ca3cfed0460ba7a035672c4835f5579d