Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe80355daa520ec…

MALICIOUS

PDF

31.4 KB Created: 2021-07-19 01:04:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 14a788a0dd648affbdb34bdd69ed7f9b SHA-1: 350c16b38d4ade14e93cd36dd4f48ffa7ac8ef21 SHA-256: 3fe80355daa520ec7483be773ced42484dca44c25574032e3c42d42bbd16ae37
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as free game hacks or generators. The embedded URLs are designed to trick users into downloading further malicious content or visiting compromised sites. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9553

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/479516143/free-minecraft-server-hosting-24-7-game-hack In PDF document text
    • http://uctovnictvosnv.sk/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/tiktok-views-free_GM835599320.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/minecraft-redeem-code-free_GM479516143.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_off000026f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26F3 22364 bytes
SHA-256: a07e05008b49b07aa39b0b5199179612f708471e1406563a6780dc5c36709499
font_01_sfnt_off0000586e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x586E 18352 bytes
SHA-256: 91a7490c887560cf1db9cb18ebb1e2a98db2d1ca6a1740dfb9f9cb38742cb9c1

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