Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e2063714922cad…

MALICIOUS

PDF

41.7 KB Created: 2021-05-14 22:07:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d930e11471fd62fea5384c4e177bc406 SHA-1: 959d2620d955629501eba92776a0f95e1dd3adbe SHA-256: c2e2063714922cad1676b0c4d7be827c0b822bcf4f18d5db22cda9ba073d5e6d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/431946152/get-free-robux-info-game-hack PDF link annotation
    • http://beagle-cindy.de/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/robux-link_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://beagle-cindy.de/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://beagle-cindy.de/images/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://beagle-cindy.de/images/coin-master-gold-cards-free-2021_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_003_off000047b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B2 24884 bytes
SHA-256: 5f487246b362d5f3e5dd50cdb0c9c2e18d43d11f3ec057e2e19cd6200deb4969
font_01_sfnt_off00008117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8117 18120 bytes
SHA-256: 6e6e8bb7c0e640fc67837f70826b1bbd381eb05acf75ec047415621944091573

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