Malicious PDF — malware analysis report

Static analysis result for SHA-256 f758bfd816d2542e…

MALICIOUS

PDF

45.6 KB Created: 2021-05-17 10:06:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b9de406d3432bab8ae8bf73605454226 SHA-1: 881212d5d7c2bdba96a37d6808a98426be1c31ee SHA-256: f758bfd816d2542eb2e6106bed4687b69e7ea5c53dd217ab20e7131ff4c6aac2
180 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at 'https://netcdn.xyz/app/479516143/minecraft-free-download-apk-softonic-game-hack'. The document body and heuristics suggest a lure for game hacks or generators, which is a common tactic for distributing malware. The presence of a visual download button and callback lure further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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) 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/479516143/minecraft-free-download-apk-softonic-game-hack In PDF document text
    • https://schulzpressetext.de/images/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/robux-premium_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/make-free-robux_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-free-link_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
stream_003_off00004cd9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CD9 29872 bytes
SHA-256: 2c0eabea6a86716a43f435b499333e0ad983d0133e1ff45474da5aa7c2658dc7
font_01_sfnt_off00008f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F15 18636 bytes
SHA-256: 8d59af17281decbf927120d542a9fc6958c86d48fe17fe9ad1336eeca3d2c8a1

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