Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb42793d5635ec9…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 13:00:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4f0678dd7d14998fb9ddf253b9f3e171 SHA-1: 1623d54e950ebd0620e0886db320a36e952225ed SHA-256: 8bb42793d5635ec9239a831a9777e93e7be54654f527e41f2739d76a90b76c69
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links designed to lure users to websites offering game hacks and free in-game currency. The primary link, https://netcdn.online/app/406889139/coin-master-cheat-codes-free-game-hack, is identified as a malicious redirector. The document body, though partially garbled, contains similar lures and references to game hacks. The presence of a visual download button further supports the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-cheat-codes-free-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/pokemon-go-free-legendary_GM1094591345.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.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_off000053bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53BB 24860 bytes
SHA-256: 8dedd2dd22349d3dbd0ed9ec607bc5d7b70a6114f2e2448b1ff1f391d7334a82
font_01_sfnt_off00008d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D75 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9728 18052 bytes
SHA-256: e1f7dc216c669c22560805cc0a50cb8b77f141bfe6c38f33d25df223dbe053b5

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