Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e340fcd6c6644b5…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 08:54:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 605d55069b4eec00dcd48dfe09e260e8 SHA-1: 12265f17f1c7c19ae7c5d04bd4d7d513f1c4f5fd SHA-256: 1e340fcd6c6644b57d96d58ba04d22df4ad5b50658eb08072d56a264d3b211ab
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a "free Robux generator" or "game hack". The presence of these lures and the ML classifier's high confidence score indicate a phishing or scam attempt. While no scripts were explicitly extracted, the embedded URLs and the nature of the lures strongly suggest a social engineering attack designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/431946152/free-robux-generator-no-verification-game-hack In PDF document text
    • https://www.nara.org.uk/uploads/files/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-robux-master_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/xray-hack_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/roblox-svg-free_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.nara.org.uk/uploads/files/files/free-robux-hack-no-human-verification_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
stream_004_off0000523d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x523D 27656 bytes
SHA-256: 62018e85ea15170d204af4ddc20875fefd4410c02e60e427219bfc5282d98fb0
font_01_sfnt_off000091a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A0 18600 bytes
SHA-256: fd611ad94f1c5362e5936d61a0ca6686a852f181e3b69dadbb107f1a26b259f7

Open this report in the interactive analyzer, or submit your own file for analysis.