Malicious PDF — malware analysis report

Static analysis result for SHA-256 019967e31eb9cfc1…

MALICIOUS

PDF

41.2 KB Created: 2021-05-19 15:07:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fcaacb20c2252dcc16b8977105ff83b5 SHA-1: 5a7dc32666df05a23d1ee9fcd3edcaf9fe68d9ff SHA-256: 019967e31eb9cfc14401c766f5c32a8f4a2d36d937f40ada15cd7aba5456b284
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and free in-game currency, a common lure for phishing or malware distribution. The ML classifier and specific PDF heuristics strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a workflow designed to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/village-3-coin-master-game-hack In PDF document text
    • http://dieter-sauter.com/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-group-payouts_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_off00004842.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4842 23808 bytes
SHA-256: 97524ab88addcf84d23e296f488c2af060fae4abd48a02de114a7301b1c7725f
font_01_sfnt_off00007e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E74 18216 bytes
SHA-256: b1b00e9a7d41aa718c2a53fd3f5d6ec11507194a196a1a07c5c67219da45c191

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