Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27364658ecabf0e…

MALICIOUS

PDF

44.6 KB Created: 2021-05-17 10:38:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9a4452605c1b3fbf87e5e7186d263f7a SHA-1: 298aa439e814fb078e30ef89ff83ee4ce2bfa67e SHA-256: f27364658ecabf0e66325a410585ae42845f3208c68a7d5017bf4c63118ee41b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to websites offering 'free spins' and 'robux' for popular games like Coin Master and Minecraft. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. While no scripts were explicitly extracted, the structure and numerous external links suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • 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.
  • 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/coin-master-free-spins-app-for-iphone-game-hack
    • http://ivpr.net/images/free-robux-without-human-verification_GM431946152.pdf
    • http://ivpr.net/images/can-you-give-me-robux_GM431946152.pdf
    • http://ivpr.net/images/minecraft-account-hacked_GM479516143.pdf
    • http://ivpr.net/images/how-do-you-get-free-food-on-coin-master_GM406889139.pdf
    • http://ivpr.net/images/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdf
    • http://ivpr.net/images/cm-free-spin-link-today_GM406889139.pdf
    • http://ivpr.net/images/free-minecraft-java-edition_GM479516143.pdf
    • http://ivpr.net/images/coin-master-hack-september-2021_GM406889139.pdf
    • http://ivpr.net/images/earn-robux-websites_GM431946152.pdf
    • http://ivpr.net/images/fan-page-coin-master_GM406889139.pdf
    • http://ivpr.net/images/coin-master-rewards-free-spins_GM406889139.pdf
    • http://ivpr.net/images/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://ivpr.net/images/20-free-spin-link-coin-master_GM406889139.pdf
    • http://ivpr.net/images/free-coin-master-spins-blog_GM406889139.pdf
    • http://ivpr.net/images/free-spins-coin-master-twitter_GM406889139.pdf
    • http://ivpr.net/images/card-hack-for-coin-master_GM406889139.pdf
    • http://ivpr.net/images/free-robux-scam_GM431946152.pdf
    • http://ivpr.net/images/hacker-coin-master_GM406889139.pdf
    • http://ivpr.net/images/coin-master-free-coins-no-human-verification_GM406889139.pdf
    • http://ivpr.net/images/coin-master-link-for-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048b8.bin
9bab875a194fe0d04eadd00058780db7edccc305a45bd8422422d8df6ff1063a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B8 24204 bytes
font_01_sfnt_off0000802c.bin
c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
pdf-font-stream PDF embedded font (sfnt) at offset 0x802C 3560 bytes
font_02_sfnt_off00008cb2.bin
4aba056016aeb65aeba62e03d7234ea924a4b970c64610ba6e784186ab2969a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB2 18052 bytes