Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdaf0294eeaa558…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 20:51:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cc2aed0aafc98aaba2b6d9423917c53f SHA-1: 1648817be716a6aaaacf2870fe9a6dd283285726 SHA-256: 0bdaf0294eeaa558648224349d926053865f7a5712c213530a148bcb52a3efcb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure is a "Coin Master Hack Download" which points to a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or engage in scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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 https://netcdn.online/app/406889139/coin-master-hack-download-ios-game-hack In PDF document text
    • http://digilib.stimlog.ac.id/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-redeem_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000511b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x511B 24632 bytes
SHA-256: 75b7e44d16760f15ebd9d30ad1cc1b8b0a5936a9e9be6631c4448f6b9e78667c
font_01_sfnt_off00008716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8716 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off000090b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B4 18296 bytes
SHA-256: eb74dfbf061b28f56530c4f3611099698c9338eeb1cc06642e5044c6dd5fa24e

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