Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0c9cbef3c6c323…

MALICIOUS

PDF

33.0 KB Created: 2021-07-06 22:29:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7320eb144001f48669b164551f0e2b3c SHA-1: 31a97baee9cc32ab2366936315827307e9f8c8fe SHA-256: 7c0c9cbef3c6c323649e608bac13051ca05c176e425e0a878835b5221a9e4f0a
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to a redirector and a link farm of other scam PDFs, masquerading as generators for game hacks and free items. The primary lure is the URL http://netcdn.tw/app/479516143/free-minecraft-wallpaper-game-hack, which is associated with malicious redirector infrastructure. The document body and heuristics indicate a social engineering tactic to trick users into visiting these scam sites.

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.tw/app/479516143/free-minecraft-wallpaper-game-hack In PDF document text
    • https://vierabyragazze.com/upload/files/free-roblox-accounts-with-robux-2021-october_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-stuff-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/gift-robux-com-free_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-roaming-camera-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-tee-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-demon_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-play-minecraft-with-friends-for-free_GM479516143.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_off00002fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD0 21352 bytes
SHA-256: a377a8bf5189359780f6d2828ca4f29030ba001fd33b03343a7fb8e28d8fa631
font_01_sfnt_off00005e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5B 18304 bytes
SHA-256: 4d587039156ed044efa68da2e07a531ede57de6bcf94accf984a6e3449228bdd

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