Malicious PDF — malware analysis report

Static analysis result for SHA-256 50595cbce39dab91…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 23:02:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5f8e80f0cc524ecd37e44b3acc66a090 SHA-1: 7a90341e558e3e93a56e595ef3db789f2dc6bc8f SHA-256: 50595cbce39dab91371ab61a89227353cf742e1f2db90ebff43ce8d9da05666a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links, including one identified as a malicious redirector, designed to lure users with promises of free game hacks and currency. The primary malicious link, http://netcdn.tw/app/406889139/free-spins-coin-master-daily-game-hack, is likely part of a phishing or scam campaign. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for exploitation or redirection to malicious content.

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.tw/app/406889139/free-spins-coin-master-daily-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-10k-robux-by-redeem-code_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-hack-v2-1_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-on-ipad-2021-easy_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-roblox-promo_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-roblox-accounts-with-robux-december-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-event_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-cheat-in-dna-on-ds-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/ez-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-roblox-hats-3_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/i-will-hack-and-kill-you-parent-roblox-group_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-veil-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000305c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305C 21856 bytes
SHA-256: bb57ef479bc7af2f7353c3881fdeb4647c4be76811ec3a3410e400da66f5b90e
font_01_sfnt_off00006087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6087 18596 bytes
SHA-256: 5411b9dbca58f16f8af8c21ebe49ba809f0efece3103b9aa7bb9d97b6685b20b

Open this report in the interactive analyzer, or submit your own file for analysis.