Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86fa6a2a7328f93…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 09:39:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 332a9b5833a6f7f46ac157b7ab33bcde SHA-1: 4b17bffbc5cbf7933a19f4db27372f7041deebfc SHA-256: d86fa6a2a7328f93413d333cee08c4f8a3aca359edb736c521d11e24b8810cb9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to a malicious URL, likely intended to lure users into downloading malware or visiting a phishing site. The document body and extracted URLs suggest a scam related to free game currency or hacks. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/free-spins-coin-master-no-verification-game-hack In PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/pokemon-go-free-play_GM1094591345.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-coins-coin-master-blog_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_004_off00005016.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5016 25416 bytes
SHA-256: e19175a029f96a4790f460cc736e82f71dfb85a23b7595c822e4bf165d9afa56
font_01_sfnt_off00008a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A91 2976 bytes
SHA-256: 78c6f4a185c31f5acfafabca91b9ec31683e4330b61d82f68f4820d5bd3383a1
font_02_sfnt_off000094eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94EB 18020 bytes
SHA-256: 77b170e61ca69d8811d571f4609d25c793482ce418daab97f8cf0cf89b73ec51

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