Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29a582f5c7bbad2…

MALICIOUS

PDF

44.2 KB Created: 2021-06-07 08:51:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 660d9cc0f71db47ea3cf852c7f370437 SHA-1: e57122bc88c1ab10021e666972691d9606e9ad40 SHA-256: f29a582f5c7bbad2281862e7c24a4feefd2fb2a87f107110efb6d96965a93f6d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The embedded document body text, though partially garbled, also contains a URL pointing to a malicious redirector. These findings strongly suggest the document's purpose is to redirect users to malicious sites, likely for malware distribution or phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.
  • 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.tw/app/431946152/pastebin-link-for-free-robux-game-hack In PDF document text
    • http://leagueforwomenrights.gr/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/master-game_GM406889139.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://leagueforwomenrights.gr/images/free-robux-codes-2021_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_off00004fce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FCE 24592 bytes
SHA-256: 23be3615652d3c4fd52ba6af6ae77404b017922ad2cdff80f5850a4849f4be46
font_01_sfnt_off0000889e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x889E 18792 bytes
SHA-256: b755063030e69722aae1e30807f2397c4e1b0744b9925ef597f8b2517e96f039

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