Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d308ef0c5749a2f…

MALICIOUS

PDF

45.0 KB Created: 2021-06-07 14:07:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4b4eb29a0cef84eee2527b626412d6c5 SHA-1: df1b43c81dbac26354b6f93796880d25b2cd7292 SHA-256: 8d308ef0c5749a2fe03be778d1e2cf1f894ca6d85695ef2d22a4b690f787c105
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, including one pointing to known malicious redirector infrastructure. The document body and heuristics suggest a lure for game hacks and free items, designed to entice users to click through to potentially harmful sites. The presence of multiple external PDF links further indicates a link farm or SEO manipulation tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/hacks-for-electric-state-roblox-game-hack In PDF document text
    • http://behsanroshd.com/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://behsanroshd.com/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://behsanroshd.com/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/simplysarc_GM479516143.pdfIn PDF document text
    • http://behsanroshd.com/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://behsanroshd.com/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/pubg-uc-price-list_GM1330123889.pdfIn PDF document text
    • http://behsanroshd.com/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • http://behsanroshd.com/images/free-minecraft-account-and-password_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
stream_004_off00005275.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5275 25016 bytes
SHA-256: b795651935f37996aac26efd41056860ebe37fe61db30266b5c568052c093c88
font_01_sfnt_off00008c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C95 18568 bytes
SHA-256: ab5f7c4477a6f5bb0f93a8fc5e87d9630a192a0ed98691673efe0ac333065997

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