Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef5501b03eb64114…

MALICIOUS

PDF

49.7 KB Created: 2021-06-03 23:21:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5cc43ff4437e2b95b731d27c03025e5f SHA-1: 252a274a3b28cce95bb860cd13575b2c7c91a5e2 SHA-256: ef5501b03eb64114631bd0324740def59f0f6d994eef193b97938192ecea710b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The document body and embedded URLs suggest a phishing attempt related to in-game currency or cheats. While no scripts were explicitly extracted, the PDF structure and the nature of the links indicate a high likelihood of redirecting users to malicious sites designed for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/431946152/how-to-get-free-stuff-in-the-roblox-catalog-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/getrobux-info_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/without-tiktok-free-fire_GM835599320.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-robux-today_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_004_off000054ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54CA 28244 bytes
SHA-256: 0a7e01b4a5412169c40b1686ae476612931ac9063cb704d7d235031760858b6c
font_01_sfnt_off0000937e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x937E 2884 bytes
SHA-256: b25f3201ca685031c5e65ee7114c16b707a2babc8ecececce483f5496adadc73
font_02_sfnt_off00009d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D77 19036 bytes
SHA-256: da0c0f15b715538f44db1daa0ac2c182fcb1371d899b85b6476abf7a322251fd

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