Malicious PDF — malware analysis report

Static analysis result for SHA-256 73825c74b4cea2b7…

MALICIOUS

PDF

42.8 KB Created: 2021-05-13 14:50:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 542bc29f678ef0e90ff913872bfea7f8 SHA-1: dc2276471715e6cbc2fb68446d7cda0b713409ba SHA-256: 73825c74b4cea2b779e557720d642297737fe883f2d49b81996d562bd09fed88
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, disguised as "free generator" or "game hack" lures. The document body and extracted URLs strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and the nature of the links indicate a high likelihood of malicious redirection, potentially leading to further malware downloads or credential harvesting.

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/get-free-cards-for-coin-master-game-hack In PDF document text
    • http://premsolarcell.com/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://premsolarcell.com/images/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://premsolarcell.com/images/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://premsolarcell.com/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://premsolarcell.com/images/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://premsolarcell.com/images/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://premsolarcell.com/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://premsolarcell.com/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://premsolarcell.com/images/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://premsolarcell.com/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://premsolarcell.com/images/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://premsolarcell.com/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://premsolarcell.com/images/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://premsolarcell.com/images/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://premsolarcell.com/images/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://premsolarcell.com/images/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://premsolarcell.com/images/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://premsolarcell.com/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://premsolarcell.com/images/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://premsolarcell.com/images/minecraft-free-download-chromebook_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_off00004a52.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A52 25784 bytes
SHA-256: fd02bfd6b912f8f74e14b36cebc88af378874d57bd0b83813b22b4a347db483c
font_01_sfnt_off0000865a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865A 17884 bytes
SHA-256: 2df54ae97b7ad974d0fd113118d78f36970e506fc507bb8e05cd99f47a54c96c

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