Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa34a063b2567d4…

MALICIOUS

PDF

39.7 KB Created: 2021-05-23 12:11:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9f363aa9e44ea09517c28294da5cd5a3 SHA-1: a32e29027a0be19f667374e110223d2e7c03e709 SHA-256: 9fa34a063b2567d401b6f1c430c4469a5c27a31f371bb1103338dd1a4d39bf87
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors disguised as free game hacks or generators, a common lure for phishing. The document body and heuristics confirm the intent to redirect users to potentially harmful websites. No scripts were extracted, but the presence of multiple malicious URLs and the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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.xyz/app/479516143/how-to-get-minecraft-for-free-on-phone-game-hack In PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://www.manmed.info:443/images/getrobux-come_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35E2 25664 bytes
SHA-256: 4c1ec6019263b8f620212a1e8f18c7b056fda547b54136ef4802939d307d9a84
font_01_sfnt_off00006fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC9 3040 bytes
SHA-256: 88825791b477d01e298e214e5620cbb87e7de6c15ffaae46d1f1371055908c03
font_02_sfnt_off00007a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A55 18192 bytes
SHA-256: 90b6a34edb34d309cd556a6b23817db9766b775643cedc81c4ce7203f03c64d4

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