Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aaa5907b6d83202…

MALICIOUS

PDF

35.0 KB Created: 2021-06-20 12:56:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 00e1f625c6b1e2ac4bce1d1be36d3f9c SHA-1: 09a04afe60d3f9035ff4dafe8f5e63614da05d1f SHA-256: 4aaa5907b6d83202714548564b5a6f710bf3e6e9398c45efecbd8894f20bfea4
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games. The document body and heuristics indicate a lure to click these links, which likely leads to malware download or further phishing attempts. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a phishing or malware distribution campaign.

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.co/app/431946152/free-roblox-thumbnails-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-codes-no-survey-no-download_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hacks-for-mad-city-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-with-inspect-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-2021-not-patched_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-knife-codes-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-often-pubg-uc-advance_GM1330123889.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-vip-in-roblox_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
font_00_sfnt_off000030db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DB 22576 bytes
SHA-256: 637ae66ed8361cc6e4dc456bf5a2b15a471c9d7e7b09a5dda569e569c69594d8
font_01_sfnt_off00006323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6323 19336 bytes
SHA-256: f8012677839fd183fda7e1488d1e0e93dcc64c02dc06b776c235ce634b03799e

Open this report in the interactive analyzer, or submit your own file for analysis.