Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c79051aac0e6d8…

MALICIOUS

PDF

32.6 KB Created: 2021-07-03 14:41:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d384ad9ffe3cffda4becb3d4e943f7de SHA-1: acc66ff2220aa2b9013bd703a800f444eecee3ab SHA-256: f1c79051aac0e6d83a9373a1882efd89d9521092b90c7a093c8a4a0838bdd59e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The ML classifier also flagged this PDF as malicious. The presence of these links suggests the document is designed to trick users into visiting potentially harmful websites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.tw/app/431946152/ww-roblox-come-game-hack In PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/mask-free-roblox_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/2021-roblox-hacks-february-2021_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-robux-by-joining-a-group_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/roblox-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-do-you-get-a-cheat-menu-in-roblox_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/roblox-exploit-free-executor-2021_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-do-you-hack-pn-roblox_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/hack-robloxcom-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/tiktok-free-movies_GM835599320.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/roblox-how-to-get-free-stuff-from-catalog_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-coin_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 2

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_off00002a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A0C 21888 bytes
SHA-256: 785e6f43011d43f29a292e7c6d42a6ef3b87ffc4adaaed256b4ec0efec1f744a
font_01_sfnt_off00005a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A70 19108 bytes
SHA-256: 90580883745e156586b97c3ed689431169c004bf7d7dde53d905db1a3f24cb6d

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