Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75220e0bc6ef260…

MALICIOUS

PDF

34.6 KB Created: 2021-06-29 17:43:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 00642e92e5f7c6f50b7af3e003a98d56 SHA-1: aad96d93813dd9115cd8633d941fca4e85f65156 SHA-256: f75220e0bc6ef260ac17915c3353b3ff26e5ea2d517cb03f8e49a12362963a82
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The document contains numerous links to redirectors and SEO-optimized PDF link farms, indicating a phishing or scamming attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/431946152/roblox-how-to-get-a-free-name-change-game-hack In PDF document text
    • http://www.sovtigaz.ru/f/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-free-synapse_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-anti-anti-cheat_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-hack-any-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/madcity-free-car-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-roblox-accounts-2021-with-pin_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-hack-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-no-verification-2021-android_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
font_00_sfnt_off00002ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBB 22648 bytes
SHA-256: fb61d74e1a03eecec55b71c3b16ac4d0b3012cdd887d2666bdb48bc70a3fe034
font_01_sfnt_off0000618b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618B 19344 bytes
SHA-256: 95399939266fb3580983cbae1f1ad9bcf7b3f4319b84707211ca473f8057dfe4

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