Malicious PDF — malware analysis report

Static analysis result for SHA-256 a502c75c61e7f276…

MALICIOUS

PDF

45.5 KB Created: 2021-05-13 16:51:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a1d7aa931b7397542b82b4665e79908c SHA-1: c2a354de8e9beb4bb73bb3a20f9f3335c5cd1610 SHA-256: a502c75c61e7f276a109b42ce419f781e9f9c0ade81db9d44a79c587f70fa51f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, including one that directly references 'how-to-hack-coin-master'. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of these lures and the ML detection strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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/406889139/how-to-hack-coin-master-using-es-filer-game-hack In PDF document text
    • http://killebergsridsport.se/images/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-app_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-pe_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-free-spin-and-coins-links-2021_GM406889139.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_off000049be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49BE 25964 bytes
SHA-256: 7be3a1873d7840cac96272a0d7ee263d9631690cf5ed0bbfc176a5c5dc74d2e8
font_01_sfnt_off00008462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8462 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4D 18592 bytes
SHA-256: 7b6829f0c912f355393962c39643cd2cadf5d604c17bb92301d7763a729473f1

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