Malicious PDF — malware analysis report

Static analysis result for SHA-256 407eef361fd6bd32…

MALICIOUS

PDF

45.5 KB Created: 2021-05-19 07:06:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c965fcd07761b8c633f7a70f8056d8aa SHA-1: d4efa9c5eac4e05dbafad21de66879839be091f2 SHA-256: 407eef361fd6bd328da42c14f7230168d264c3ee62e1fc19bfa4cd640e4de13b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a malicious URL. The document body and embedded links reinforce this lure, aiming to trick users into downloading potentially malicious content. While no scripts were explicitly extracted, the nature of the redirect and the lure suggests a common pattern for delivering second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/play-full-version-of-minecraft-for-free-no-download-game-hack In PDF document text
    • http://advancedaudiosystems.org/images/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/earnrobux_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://freegiftcodes.euIn 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_off000049b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B0 25804 bytes
SHA-256: 925ee318d5b17236dd52813da088898f28f3b1f8e3f5147fa123ae53d13c4340
font_01_sfnt_off000083ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83AB 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off00008d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D69 18900 bytes
SHA-256: 72a4985a0f1854ed26b55ec1f9c271b843743081401250fa5f99a0b23226d3ed

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