Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a1bfe107f5ec0e…

MALICIOUS

PDF

41.9 KB Created: 2021-05-15 08:46:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0edd9045882189e24b9cca1217d93c8c SHA-1: 6a66da898eefb1901a60f54ca6c18cfe7302426d SHA-256: 87a1bfe107f5ec0e17542ab0a8236f5b9a4dc28d91cbb4517ef35c1c62b383bc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting a 'Coin Master Working Hack'. The heuristic firings indicate the PDF is designed as a lure, linking to known malicious redirectors. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into downloading further malicious content or visiting compromised sites.

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/coin-master-working-hack-game-hack In PDF document text
    • http://sv-nahetal.de/images/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/10-robux_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-online-games-like-minecraft_GM479516143.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_off00004859.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4859 25232 bytes
SHA-256: 84b3ff4459a387d13dcb83c7dabed2750070ef5d9354848e0452cccd6e2ca8da
font_01_sfnt_off0000813d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x813D 18204 bytes
SHA-256: 1dc75b5245b2ac55ad953a86834a6689f50ea7fd6ef48808a54446099d77b069

Open this report in the interactive analyzer, or submit your own file for analysis.