Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ee9e0c1c57acfd…

MALICIOUS

PDF

46.6 KB Created: 2021-05-12 14:00:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a4cbc7eacd9bdaccbc2557b7fe77ee6a SHA-1: d12cd89bc12eb70b3ec228d1c2dc033ee032c526 SHA-256: c7ee9e0c1c57acfd20a05fbaefe32406631e2c5c0c455b62d72c4db1152a096e
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 0.8948

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/how-to-get-free-coins-on-coin-master-hack-game-hack PDF link annotation
    • http://promotion.si/images/win-free-robux_GM431946152.pdfIn PDF document text
    • http://promotion.si/images/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://promotion.si/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://promotion.si/images/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://promotion.si/images/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://promotion.si/images/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://promotion.si/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://promotion.si/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://promotion.si/images/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://promotion.si/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://promotion.si/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://promotion.si/images/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://promotion.si/images/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://promotion.si/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://promotion.si/images/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://promotion.si/images/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://promotion.si/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://promotion.si/images/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://promotion.si/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://promotion.si/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ce9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CE9 27648 bytes
SHA-256: 3a4c024836038cf861cf562d6323ccbfb8049dc22f9849a8e0e226e3f130a8ea
font_01_sfnt_off00008aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AED 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off0000948f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x948F 18044 bytes
SHA-256: 8c08c70171ded8116d72ec6b9f41602b425c47027f7aa83ef766cc7ef1375634

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