Malicious PDF — malware analysis report

Static analysis result for SHA-256 cebc9a71b5bcd167…

MALICIOUS

PDF

42.3 KB Created: 2021-05-14 20:37:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 884be6521ae73beab34a57a8247f52e2 SHA-1: a6b9eabcaf31b6b6565ff6b8c32bd2c2b7fa21f6 SHA-256: cebc9a71b5bcd167805becb65a68413308b575cae86d77b6a40b38773136e5fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free spins' to lure users. The document body, though partially corrupted, contains references to these lures and embedded URLs. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves social engineering to drive users to malicious sites, likely for further exploitation or malware delivery.

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/coin-master-fan-page-free-spins-game-hack In PDF document text
    • http://learningarabic.co.uk/images/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/robux-2021_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/40-free-spins-coin-master_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_off000048d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D9 25684 bytes
SHA-256: 1693a72c32b3183f3bf4bf700dd79b7f18ff3a55096d51e2689cab60f893c847
font_01_sfnt_off00008302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8302 18328 bytes
SHA-256: d106028e9c816c4ed38d7f9dbfb4c1b42a2571be69ef627f7b4a635c4c6a8b94

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