Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc1087cc8b0638b…

MALICIOUS

PDF

44.6 KB Created: 2021-05-19 17:06:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7242c05f2d85e3d63042e4958b37d00d SHA-1: 49424240e985f7675d8cec42b5e2019b7f64cca4 SHA-256: cdc1087cc8b0638b069d2631a0a5ac7f80de0662b463fb7e6f45bc628b88af46
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9632

Heuristics 4

  • 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/406889139/hack-the-coin-master-game-game-hack PDF link annotation
    • http://bildhauerei-roerig.de/images/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/i-want-to-grow-my-account-tiktok-free_GM835599320.pdfIn PDF document text
    • http://bildhauerei-roerig.de/images/robux-fun-hack_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
stream_003_off0000494c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494C 24528 bytes
SHA-256: fc946e069348e6cc3c9a12229d31b88975754b7ceb5634a31ef16a09a77288e9
font_01_sfnt_off00008001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8001 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off00008c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C86 18144 bytes
SHA-256: aa7008f7bc0d98fcc59006e96c258827ac3c6afac5e69ad5098b3c76289d630e