Malicious PDF — malware analysis report

Static analysis result for SHA-256 565729447cc50d96…

MALICIOUS

PDF

35.2 KB Created: 2021-06-28 21:35:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1f77dec4bb757ac715c3617aeb7456f8 SHA-1: 1341d36e66d01163bf93ee4a3315b20a51590dae SHA-256: 565729447cc50d963030208100b0ecda9db72c48c114c8fc50f8ddf714f9903b
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 0.9980

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 http://netcdn.co/app/431946152/how-to-change-your-name-on-roblox-for-free-2021-game-hack PDF link annotation
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/hacks-para-roblox-gratis_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-hack-money-on-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/roblox-vehicle-simulator-shakedown-hack-glitch_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/robux-hack-2021-website_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-get-free-clothing-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/i-got-free-tbc-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/pokemon-go-free-pokeballs-2021_GM1094591345.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-get-free-tiktok-coins_GM835599320.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_off000031ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BA 21972 bytes
SHA-256: 9f1a357aff7595ad596dbacb9e9f75ca811f35935afe92a28aeaaac06a1414d3
font_01_sfnt_off000061e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E9 19944 bytes
SHA-256: a15fbc84647a35174b9a3a425296907c71fc7af9668a730b93eff68992424769

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