Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14e7f8ca8e62eb8…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 15:05:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d19bb48e8ae950a54b394b82dcedc8ec SHA-1: 7cae8510259817370a3535ee6375304f3cdbba04 SHA-256: b14e7f8ca8e62eb81de4c7a889b267d7d239293a2b64c054ea4111d87927b155
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, promising free game currency or hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts further PDF documents containing similar lures. The document's content and embedded links strongly suggest a phishing or scam campaign aimed at users seeking in-game advantages.

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/how-to-get-free-robux-hack-game-hack In PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-hack-mod-menu-android_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-robux-para-roblox_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/rbx-com_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-accessories-in-roblox-codes_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/estan-hackeando-roblox_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-make-roblox-clothes-for-free_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_off00002d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D56 22324 bytes
SHA-256: 2fdecf888d0aea5c5d69aabbc7925633e542b808d74e41694ed915f6c7ec403b
font_01_sfnt_off00005f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0F 19152 bytes
SHA-256: a9bff55de90b7722e0be476df1c7a65da1171d9638b3b21a902752e59eae7e63

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