Malicious PDF — malware analysis report

Static analysis result for SHA-256 9234bd7a34a12e79…

MALICIOUS

PDF

52.1 KB Created: 2021-05-14 08:44:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 10f6cc6699bb8c437ff803b36289fec0 SHA-1: 080542502c2d6758f1d718e393657dbc2e1d8d5e SHA-256: 9234bd7a34a12e79e64eda81a172b7527637a98a15998f9838dcb0f43b60a1b6
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 0.9348

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/free-robux-videos-game-hack PDF link annotation
    • http://fratellimazzoleni.it/images/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://fratellimazzoleni.it/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48D2 38520 bytes
SHA-256: 96aad8f96da05a6aa2646bd1968248ccac4a53ee124d3f185205be04be6ad95e
font_01_sfnt_off00009bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BED 3992 bytes
SHA-256: 43e72e756231cfd354bd65c2ed3b09ad4eff56ad11e7f155ed2920e6bb7860dd
font_02_sfnt_off0000a913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA913 18444 bytes
SHA-256: 1ec21ed17295e3d49cd7a507c4ef3ee968e538ae560c82d8bcc555326bed268a

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