Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86e97b5e4ae2948…

MALICIOUS

PDF

43.8 KB Created: 2021-05-16 09:34:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c5500b610817ebe49c188e18345a8c6b SHA-1: e2794fec261e58884e645d083603b8aebde69625 SHA-256: f86e97b5e4ae2948c3ea1f955e7d57bea4f905e02dfacbce2860026859033f29
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, including a link farm, suggesting a redirection to malicious sites. The presence of an MFA lure indicates an attempt to harvest credentials or session tokens. The document's content and structure are consistent with a phishing or malware distribution scheme, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/479516143/how-to-get-minecraft-on-chromebook-for-free-game-hack
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/how-to-get-free-robux-inspect_GM431946152.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-spin-link-today-free_GM406889139.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/hack-roblox-players_GM431946152.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/hack-coin-master-mod-apk_GM406889139.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-robux-hack_GM431946152.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-hack-https-coinms-net_GM406889139.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-robux-codes-2021-not-used_GM431946152.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-robux-hack-no-verification_GM431946152.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/minecraft-116-apk-download_GM479516143.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/earn-robux_GM431946152.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-gold-cards-hack_GM406889139.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-daily-spin-free_GM406889139.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/is-minecraft-java-free_GM479516143.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/how-can-you-get-minecraft-for-free_GM479516143.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-minecraft-videos_GM479516143.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/game-give-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047a0.bin
11c1b6adc38af590310f70b478f428e3f8307617424a9db8cf018e87f4a06649		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A0 24500 bytes
font_01_sfnt_off00007e0e.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0E 2840 bytes
font_02_sfnt_off000087c0.bin
f21871f293e1374cce8b481ffeffb78eba3f21dd05dabec399dd2d571c50d8ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C0 18628 bytes

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