Malicious PDF — malware analysis report

Static analysis result for SHA-256 277f13b67ff3f837…

MALICIOUS

PDF

43.3 KB Created: 2021-06-03 14:36:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 58d3c0928afeb9d4e08b94fb020bdf01 SHA-1: b78114a0ecbe261e976e4370318b118def289e54 SHA-256: 277f13b67ff3f837d6225564e004b794c4e3cc2047440a9fe077349f78a45565
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one to a known malicious redirector infrastructure at 'https://netcdn.online/app/406889139/coin-master-daily-free-spins-hack-game-hack'. This URL is presented as a 'free generator / game hack', indicating a social engineering lure to trick users into visiting potentially harmful sites. The presence of numerous similar links further supports a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-daily-free-spins-hack-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/pubg-uc-whatsapp-group_GM1330123889.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/pokemon-go-free-unblocked_GM1094591345.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/robux-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-link-download-ios_GM406889139.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_004_off00004d32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D32 25048 bytes
SHA-256: a0c60988eee3b8a8355824ff22990c4403f02af0c335b4cf938d94910c6b0632
font_01_sfnt_off00008601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8601 18476 bytes
SHA-256: c2f5b1848ff169b31c97a42ada7a437145dc26f40c6d7c3b53e9420ed4832cc1

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