Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eec8230bff1d492…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 08:50:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 70529289347aaa5b9783a281f1fbfb8f SHA-1: 3637fd1b4e58fdafc4f4792961fa155569200d7b SHA-256: 9eec8230bff1d492795ad5bb9dc93ba7960fedceb1b4b2f54463f857cd49093f
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 0.9865

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.online/app/406889139/coin-master-hack-mod-apk-android-1-game-hack PDF link annotation
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-robux-safe_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_004_off000050bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50BB 24788 bytes
SHA-256: 41e451579643132c27ad8875643fd63c44348632bc415dc081180686b882dd2a
font_01_sfnt_off0000890c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x890C 18172 bytes
SHA-256: 6afee14d26951b5f7c24a7852f92ad66fc5e87cdfe243807a436cb7752adc1d3

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