Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd48d513d9f4eded…

MALICIOUS

PDF

44.0 KB Created: 2021-05-14 03:58:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1ed707659cc4225262d5aacca9e1146f SHA-1: 82e982583af51035745dfef3aa1de7285b5fe902 SHA-256: dd48d513d9f4ededb1f1d71172de30c3b600bac1a03937dc1d6af7a124194135
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 0.9969

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/easy-robux-generator-game-hack PDF link annotation
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn4sda.sch.id/__statics/gudangsoal/files/free-roblox-usernames-and-passwords_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_off00004ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA3 26648 bytes
SHA-256: c1923bb1b90a3e688411b16c36b731e1eba5f5dbca4fce077e438ec154ad84f0
font_01_sfnt_off0000893a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893A 18360 bytes
SHA-256: 31f26fbfc7f81002b444b70a1657336c723b940a34509e70260c3e3e292c9165

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