Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b13bf4358b3615…

MALICIOUS

PDF

34.5 KB Created: 2021-07-08 11:06:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a32bbb4aa7a06f785d3c85ea674213bc SHA-1: b8afd6fd4762fa62e611f555f3d6f6d148442d77 SHA-256: e3b13bf4358b3615a725b8c63fdb41f6286842a6cbcaa83213f1a24533f7f62c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document's content and embedded URLs strongly suggest a phishing or scamming attempt, masquerading as a helpful guide for popular games.

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-free-spins-and-coins-blogspot-game-hack In PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/google-how-do-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/roblox-best-hack-scripts_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/how-to-have-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/robux-hack-2021-pc_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/roblox-name-changer-hack_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/how-to-hack-in-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/free-ll-robux_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/roblox-hack-money-apk_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/who-hacked-my-main-group-chat-roblox_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/roblox-20210-robux-free_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/free-executors-for-roblox_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
stream_002_off00002f87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F87 22980 bytes
SHA-256: bb9e944d560adcfdeb7d0db9496c0437777268485186e39f54ac02aadf9917e2
font_01_sfnt_off0000633b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 18636 bytes
SHA-256: 77a53ca9a0da76c6fec701e0feff9ca620a686d010f30580b8dc7f9926b66f2b

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