Malicious PDF — malware analysis report

Static analysis result for SHA-256 09167e38186be29b…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 09:15:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7dd2589da61a5e234dbf29b243ca4e36 SHA-1: 702aff9adae40ae17b12f4a256b782b4b610aae6 SHA-256: 09167e38186be29b428f6b04801c243f295a988e1de606b5d8e1e3605825ddd8
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appear to be game hack generators, but which redirect to malicious infrastructure. The primary redirect URL is associated with known malicious redirector activity. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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-spins-hack-2021-game-hack In PDF document text
    • http://ebook.itn.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/tiktok-free-book_GM835599320.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-free-robux-no-verification_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_off00005034.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5034 24716 bytes
SHA-256: 9235e83c2577caa37c660bebcc0d5637960bdf75b0012ffec66c9f68a53ecaa1
font_01_sfnt_off000087c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C8 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000091b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91B2 18296 bytes
SHA-256: eaa60ab3b9dbdc46d7aef4d77b4227c1d0aeb4180c3635ae77be6ae4ebf58c24

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