Malicious PDF — malware analysis report

Static analysis result for SHA-256 750c1154349844a0…

MALICIOUS

PDF

42.7 KB Created: 2021-05-13 13:01:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e06811e90b0cb164f8b071f5b3ab0c08 SHA-1: 98fb88b5c2478f1569de127458ec580714e5d742 SHA-256: 750c1154349844a02e85c1e30447e2c0858adf9bb082b0fbf0cdc31a8faa737a
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/431946152/get-free-robux-now-game-hack PDF link annotation
    • http://lamascheradiferro.dk/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/robux-online_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-spin-hack-coin-master-2021_GM406889139.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_off0000476a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x476A 27096 bytes
SHA-256: 6abdac0b21a3f9578c155c79f781f89204b67c1bd68468a2c8340a39c9b215a4
font_01_sfnt_off00008479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8479 18280 bytes
SHA-256: 538c9dd0db01d2f7ccbac1c4b1e59781ee6b2d24c7879b3cb67aab50807a8027

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