Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb85a8740e55b34…

MALICIOUS

PDF

33.1 KB Created: 2021-07-08 07:42:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a94a13c0e6705cb1397d80f6fe946a85 SHA-1: 523ee98e902e4c11c19eb1efcdaaa23669238fc5 SHA-256: 8fb85a8740e55b347c338e02b8269357e12c3d1f805f2d81a1218fe05243c9ab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links indicates a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded URLs are sufficient to infer a malicious intent to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/minecraft-menu-game-hack In PDF document text
    • https://tena-g.hr/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/pokemon-go-free-revives_GM1094591345.pdfIn PDF document text
    • https://www.tena-g.hr/files/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-level-4_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-hack-client-2021-wrd_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/robux-generator_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
font_00_sfnt_off00002f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F48 21960 bytes
SHA-256: beb1c0eb2af37e12b4df13bc408ddce3fca0efc4a54a5e61c625eafca59930ba
font_01_sfnt_off00005fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB6 17996 bytes
SHA-256: e5ec272d4a709838dc4598325a3b2941e6c0bcb5d50c3fd3cab45fc549eef473

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