Malicious PDF — malware analysis report

Static analysis result for SHA-256 708711c89a876675…

MALICIOUS

PDF

33.8 KB Created: 2021-06-18 05:30:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b567d1c19d63e69f442a656656fce8e0 SHA-1: 77036d85d239d3aee2fd8f730870b9273b9b1ce0 SHA-256: 708711c89a8766754eda46063850cf1fdd8b31fdd18b212427297d17383e0fff
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are SEO-optimized PDFs related to game hacks and free currency. One critical heuristic identified a link to a known malicious redirector infrastructure, suggesting a phishing or malware distribution scheme. The document body, though partially corrupted, contains text related to 'Free Robux' and 'Game Hack', reinforcing the lure.

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/how-to-get-free-robux-ant-game-hack In PDF document text
    • http://foo.com.tw/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-jeailbreak-hack_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3A 22604 bytes
SHA-256: 8f39eacdae39a35d835726b02d59b316c32874df3ef219b221282926d34b7d2d
font_01_sfnt_off00005fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC0 18796 bytes
SHA-256: 9a8ad961970601ce7bd28794a758ee1cf8f19f9a301a22914b10cce4a32a4e0a

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