Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cea241884a89b9…

MALICIOUS

PDF

34.1 KB Created: 2021-06-22 21:37:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6c70c97a194d652e8b8f40003276df37 SHA-1: 66c1948d93abf98069adc0580de93b53742c9bc8 SHA-256: e7cea241884a89b9b55327c98cf39fc5ef623f89804fd6856fa8077d6643b758
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a lure of free game hacks and currency to trick users into clicking malicious links. It presents a fake CAPTCHA, a common social engineering tactic to coerce users into interacting with the malicious content. The embedded links, such as http://netcdn.co/app/431946152/how-to-change-your-clothes-in-roblox-for-free-game-hack, likely lead to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-change-your-clothes-in-roblox-for-free-game-hack In PDF document text
    • https://www.devries-group.de/images/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/free-100-robux_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/how-to-use-cheat-engine-64-roblox_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/roblox-comroblox_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://www.devries-group.de/images/free-vip-roblox_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/free-robux-real-no-hack_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/free-roebucks-com_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://www.devries-group.de/images/free-scripts-for-roblox-exploit_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://www.devries-group.de/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/free-robux-real_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/cant-hacking-to-pokes-acount-in-roblox_GM431946152.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_off00002fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE9 21632 bytes
SHA-256: 065a8d3ac11fbca48275ef6197df9550079f5126ec50efa13eb536a5c9f69809
font_01_sfnt_off00005f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F44 19384 bytes
SHA-256: 76c2afc5f3102cf0d6fbb214d083d2f6d4dbca3ed6dba1d2a160680bcc934155

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