Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6d76180b8b5379…

MALICIOUS

PDF

34.4 KB Created: 2021-07-22 03:56:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9bc987c3edd6cdd9d8f8b613ab92f998 SHA-1: 77ac966fe39be551ae003dd84d9c9d054c75ae96 SHA-256: bd6d76180b8b537948a7464c397f75b96d833029616dd1fcc0342deb1745523e
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains lures related to free game items and uses urgency language, directing users to a known malicious redirector. The primary URL, http://netcdn.tw/app/479516143/how-to-get-minecraft-for-free-on-iphone-game-hack, is associated with a game hack generator, indicating a likely scam or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/479516143/how-to-get-minecraft-for-free-on-iphone-game-hack In PDF document text
    • http://magistrinfo.ru/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://magistrinfo.ru/images/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://magistrinfo.ru/images/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://magistrinfo.ru/images/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://magistrinfo.ru/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://magistrinfo.ru/images/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://magistrinfo.ru/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://magistrinfo.ru/images/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • https://magistrinfo.ru/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://magistrinfo.ru/images/promo-codes-for-free-robux_GM431946152.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_off0000310a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310A 23112 bytes
SHA-256: 0d8b971f91e861e1afbb12f03ef52ddf8003289ac98c8d5ae0cd7f840c66a570
font_01_sfnt_off0000651b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651B 18216 bytes
SHA-256: bed6c76176a434f358ebc88a31d2dbe88cb1547cd8758d4c9ade2f80066016aa

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