Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5239b25831e9517…

MALICIOUS

PDF

36.1 KB Created: 2021-07-05 07:27:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2fffc79ab0b04fa19f2e19218647ac16 SHA-1: df11c924fc15dfe3e6f8d0821b7a8b0da346901d SHA-256: e5239b25831e9517bca66512aef5257cf0113db2d0395e6e549205e5d9656d5e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks. The primary URL http://netcdn.tw/app/406889139/coin-master-spin-link-today-free-game-hack is associated with a game hack generator, a common social engineering tactic. The presence of numerous similar PDF files hosted on bepquannhu.vn further indicates a campaign distributing malicious content.

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/coin-master-spin-link-today-free-game-hack In PDF document text
    • http://bepquannhu.vn/upload/editor/files/hack-sever-roblox_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/emeritus-hack-roblox_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/buy-for-free-roblox-builders-club-classic_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-speeed-hack_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/inject-hack-robux-2021_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-make-your-own-roblox-audio-for-free_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/doggo-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/hack-coins-roblox-obby_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_off0000347f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x347F 23364 bytes
SHA-256: 35fec4fcf58dfa534d12c6c1279b5cd8a2fb29a4472de5b8dd51e842343cfedb
font_01_sfnt_off00006910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6910 18696 bytes
SHA-256: a82e7d6c674e876005ad91f169d74ccb0002f7b2bc0316871cc95b3b2936fb12