Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38b59274ccd78fc…

MALICIOUS

PDF

44.8 KB Created: 2021-05-14 16:45:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fe7d07aa82c2ba9c5cdd5961fc988abf SHA-1: c90ed30d95900a2bc2742c570d702485ae91fbb6 SHA-256: e38b59274ccd78fcce5925a810fa5b07a11f2d9c19aac68f54b69616154ff49a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as offers for free game currency or hacks. The document body and embedded URLs strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting. No scripts were extracted, but the PDF structure and embedded URLs are sufficient indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/free-coins-and-spins-game-hack In PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/easy-robux-today-com_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004832.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4832 26696 bytes
SHA-256: 9a4046479b0c977fd37d38ec7d3d9ff30f193d37a90d8da56ed145e1b92c143e
font_01_sfnt_off00008486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8486 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off00008e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E26 17728 bytes
SHA-256: e3d0b8926ee7e267670c6470891f76c6f1adfe71673e36adb63f096bfed3a95a

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