Malicious PDF — malware analysis report

Static analysis result for SHA-256 14466cfd8b3e0bd2…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 05:38:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3e82c263c8438a8eaf1f358a4fdba8fb SHA-1: 9564a3c322371cef3d206319a5300128b6ad3e51 SHA-256: 14466cfd8b3e0bd269a403cd9cd6b34192bbe2bce492652fe3474b3abaac4acd
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to redirectors and SEO-optimized PDF files, masquerading as generators or hacks for popular games. The primary redirector URL is http://netcdn.tw/app/406889139/instagram-free-coin-master-spins-game-hack, which likely leads to further malicious content or malware. The document's structure and content strongly suggest a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/instagram-free-coin-master-spins-game-hack In PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-lice_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/ex-7-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-legit-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-free-robux-on-android-tablet_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-look-like-project-zorgo-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-download-of-roblox-game_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-items-that-are-now-expire-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-roblox-items-in-catalog_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/silent-assassin-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-meep-city-10000-cheats_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-dont-get-anything-from-survey-varification_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-zone-free-robux_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
stream_002_off000032c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32C5 23052 bytes
SHA-256: 829c9ec8bfb2230a98a853d779905b189c341eaa614c210e6754b9f3528a692f
font_01_sfnt_off0000666c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x666C 18432 bytes
SHA-256: 1f2da1675223b6dbd442bdca0602b4e79ac37dfffde3eb4afc1c712a36baf636

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