Malicious PDF — malware analysis report

Static analysis result for SHA-256 624cf548aafd62a2…

MALICIOUS

PDF

42.6 KB Created: 2021-05-16 18:07:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-05-29
MD5: db9f550ae78422381218ac65a47fc44f SHA-1: 1baa9cc385e5677d282458ebd3f85a3b91645e1a SHA-256: 624cf548aafd62a2d3c69075f5bd6e0f95e873c2304a87e3cceceec54648207d
280 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/how-to-get-minecraft-for-free-on-mobile-game-hack In PDF document text
    • https://bancroftandsons.com/images/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://bancroftandsons.com/images/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • https://bancroftandsons.com/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://bancroftandsons.com/images/how-to-get-coin-master-free-spins-in-email_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bd1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD1 24992 bytes
SHA-256: e84d8d4d0d4c0800d6b0643d08525bbcf86ba3135c4b4e7fa88632abb3456b50
font_01_sfnt_off000084fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FA 18104 bytes
SHA-256: 355b14cb1237cfcb324f2687d1fc3cafef0ca686705333751d3cf0333155011f

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