Malicious PDF — malware analysis report

Static analysis result for SHA-256 61282d2069aa3cd5…

MALICIOUS

PDF

47.7 KB Created: 2021-05-21 20:03:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: afc850ec993c085349fcf5b179b5babb SHA-1: 5c786aa5435255e677e3ec5d72876bf5e041c7ba SHA-256: 61282d2069aa3cd5c0c742511d6b0b9c470d343197e61a2c06c668a3da8337e0
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hack generators. The primary lure, 'how-to-hack-roblox-accounts-on-phone-2021-game-hack', redirects to the malicious domain netcdn.xyz. The document body and heuristics indicate a phishing or scam attempt to trick users into clicking these links, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7358

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/how-to-hack-roblox-accounts-on-phone-2021-game-hack In PDF document text
    • http://clinicadentalvilaplana.es/images/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coin-master-working-hack_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
stream_002_off000037d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37D0 29592 bytes
SHA-256: 73e17faeac4a35bf0bc61d0cd339e5a8df358dac924a0517be22b24448f4c7bc
font_01_sfnt_off00007bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC8 8376 bytes
SHA-256: 092b7a11ef2af93d0b61b37032e6f669359ea7bc5bcb682d43a712f599a5ca39
font_02_sfnt_off00009697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9697 19312 bytes
SHA-256: ee3ccdf346fecf17211ec9caf874d857695d657b5f92e2b1f0fe00576c016ffb