Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2e5fd72a1dd831…

MALICIOUS

PDF

48.9 KB Created: 2021-06-09 13:37:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 60e61a61adc67ae38fb46865713d4a2d SHA-1: a34aef076165a8e17e4972fb3a1dd124c4cd5da3 SHA-256: ab2e5fd72a1dd83181f1e4a4ef7064a861359f410617db2e3eaa5029d1f14f42
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically luring users with 'free generator / game hack' content. The document body and embedded URLs point to infrastructure associated with scams and link farms. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/point-prizes-free-robux-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/roblox-18_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-sued_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-cheat-engine-how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-sell-an-item-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-anti-cheat-speed_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-cheat-money-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/all-of-the-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/adopt-me-roblox-money-hacks_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-shoulder-pets-on-roblox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/hacker-web-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000517d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x517D 26332 bytes
SHA-256: 7713dc1ce98a3c777d2498a17ec5cd10d0914f61e22a4dc28cd5019568ff7338
font_01_sfnt_off00008ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECF 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE1 18472 bytes
SHA-256: fe916d9121075d0a48fc8138e802707832ac6bcc3fa272a78626760fbd7667cc

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