Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae9901b46bdff87…

MALICIOUS

PDF

46.3 KB Created: 2021-05-13 09:30:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5edfaf3fd20948182afca0c152269988 SHA-1: a43441bb61d2a96131664864e243036dc100e845 SHA-256: cae9901b46bdff87f80e715084efcef04474646ed3a31090de5c9d273f423edf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure the user into clicking on what appears to be a game hack or generator. The primary link redirects to malicious infrastructure at `https://netcdn.xyz/app/431946152/robux-game-game-hack`. The document body, though heavily obfuscated, contains references to this URL and other similar-looking URLs hosted on `masseymotorcars.com`, suggesting a phishing or scam campaign. No scripts were extracted, but the presence of multiple malicious redirector links indicates a high likelihood of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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/431946152/robux-game-game-hack In PDF document text
    • https://masseymotorcars.com/images/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/corn-master_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • https://masseymotorcars.com/images/how-can-i-get-robux_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004800.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4800 26268 bytes
SHA-256: f078c7fc5bf6df209e5063807b89c631881ff0b13b43754d9f1f502ce0801786
font_01_sfnt_off00008532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8532 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9244 18340 bytes
SHA-256: c3384937c05d12942e5ee2f32f048a43efe3336dc3e7ac7a8d2adf4ff389f548

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