Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70f6e7a90f13df7…

MALICIOUS

PDF

34.7 KB Created: 2021-06-28 02:59:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7b899e7dbbc4adf6bf8f6cea70d23a37 SHA-1: a6ed040618e5669eeb0e3e5872a6520763b28e78 SHA-256: b70f6e7a90f13df7102f1b0ee51f07132c16ddd6d52313446951915f43681424
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for free game currency and hacks. The primary malicious URL identified is http://netcdn.co/app/431946152/free-robux-quickly-game-hack, which is linked to known malicious infrastructure. The document body reinforces this lure by mentioning 'Free Robux Quickly'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-quickly-game-hack In PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/dbz-rage-roblox-cheats-for-unlimited-power_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/roblox-boys-cheating-on-girl_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/www-free-robux_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-hack-into-files-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/gamecraft-org-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/roblox-studio-free-robux_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0E 22500 bytes
SHA-256: 4e30f2c38ff01ea2f2accb91802ba790f984f3c805d038c38c12f1432d627e3d
font_01_sfnt_off00006162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6162 19416 bytes
SHA-256: 6b6483d58fa32afbb3db2046ed36ac736b5223a9bc16bd142b24f67e7cb740e8

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