Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf4bf013b88f1af…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 11:43:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 04283bc8b8f84f93ed1b3cde708729d9 SHA-1: f7d461dd597f9a6cb060b80c3f1f04b16016eb33 SHA-256: aaf4bf013b88f1af24686bda08ad88654e9d6858ef9e0c6fca964acaf4e3c8a4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external resources, with a primary link identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'Coin Master Game 2021 Free Spin Link', aligning with the heuristic findings of a game hack redirect. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/coin-master-game-2021-free-spin-link-game-hack In PDF document text
    • http://digilib-pps.unja.ac.id/repository/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/pubg-uc-new-redeem-code_GM1330123889.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/pubg-uc-nasl-alnr_GM1330123889.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/master-coin-hack-mod_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_004_off0000502d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x502D 24188 bytes
SHA-256: 6d9a64620fdfff6d5c05e937ca13b4174da0ba78d0da5f8e57a0dadbdb5536f1
font_01_sfnt_off0000878f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x878F 18720 bytes
SHA-256: c06f5e8b9ab2acfb3f49a3940a6d9066c25402b6dd6b7f3202255c4f1980ff73

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