Malicious PDF — malware analysis report

Static analysis result for SHA-256 029c4ea5ddf60a5b…

MALICIOUS

PDF

42.0 KB Created: 2021-05-19 08:16:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 09b2b67b87e9c52f05b9d6e7093404b9 SHA-1: e3d50952a9f3235680f233de067ac89d198f89ab SHA-256: 029c4ea5ddf60a5b8a62a116147d5b21ffd7878fdb62d0fb3e421157a6559268
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 0.9971

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/406889139/free-games-like-coin-master-game-hack PDF link annotation
    • https://dirigentigiustizia.it/images/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-android_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-by-watching-ads_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
stream_003_off00004a9e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A9E 24356 bytes
SHA-256: 2cb514be506747110d7b3a7686562e33a12994f489e26ac03dbfa8b507b076ac
font_01_sfnt_off00008273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8273 18140 bytes
SHA-256: 0fa8c8b4839815decb7824e6abfd23c338a1fcad8391028ddb14be23d50d94bc

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