Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e834544ff2ab84…

MALICIOUS

PDF

52.1 KB Created: 2021-06-03 12:40:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7f2c151dd46a20bc632119d2993c9e16 SHA-1: dd1a59bb4d0d14fd713fa70b88a05473dd913754 SHA-256: 12e834544ff2ab842dbd0f2983880806d5326bef4d23ce38fe9cf36e52e023ff
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a link farm, directing users to various external websites under the guise of game hacks and generators. The primary lure appears to be related to 'Coin Master' and 'Robux', common targets for social engineering. The document contains numerous embedded URLs that likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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-free-attack-game-hack PDF link annotation
    • http://perpus.wdh.ac.id//repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-phantom-forces-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000549c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x549C 25564 bytes
SHA-256: b3e49ec9d4572dbb21c618b642f62152089ccf2aacb478b5fa63558b71df8069
font_01_sfnt_off00008efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFA 5272 bytes
SHA-256: b9f1a3c583e9034d62081b740a8c831d7b8d18228dce46b13f4ccb2b9f97e98d
font_02_sfnt_off0000a03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA03B 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off0000aa2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA2B 17880 bytes
SHA-256: 96402d2e96280801386aa337121127c59561cdc8f458ec32dbe1421b57db916e

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