Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ec3097e51508cb…

MALICIOUS

PDF

44.2 KB Created: 2021-05-15 10:35:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d73acac7ce2697258fe679d645748549 SHA-1: 5aa103c9fc21b4d90cf754034b68a92616bddd8a SHA-256: 88ec3097e51508cb17f641ae9793bd6460d97cfb912500d57451d56fa85723ec
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which point to other PDF files, forming a link farm. The primary URL, https://netcdn.xyz/app/431946152/robux-free-2021-game-hack, suggests a lure for free in-game currency, likely a scam. The presence of a ML classifier firing with high confidence further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/431946152/robux-free-2021-game-hack PDF link annotation
    • http://www.fanciullovito.it/images/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fanciullovito.it/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.fanciullovito.it/images/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://www.fanciullovito.it/images/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.fanciullovito.it/images/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://www.fanciullovito.it/images/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.fanciullovito.it/images/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.fanciullovito.it/images/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://www.fanciullovito.it/images/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.fanciullovito.it/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.fanciullovito.it/images/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.fanciullovito.it/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://www.fanciullovito.it/images/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.fanciullovito.it/images/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://www.fanciullovito.it/images/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.fanciullovito.it/images/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • http://www.fanciullovito.it/images/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.fanciullovito.it/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fanciullovito.it/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.fanciullovito.it/images/free-robux-link_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c78.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C78 26448 bytes
SHA-256: 4ef6f2c36bbff7583b40173cde8c4ac1b02295c3b921919ab26cd80542fdb70e
font_01_sfnt_off000089de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89DE 18416 bytes
SHA-256: 1a644f5289783458eb76ac5741ebd0afe9ba6d8f40911ca8ddb4573f3c6c1b2f

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